Difference between revisions of "Tools"

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== Misc==
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= Tools Menu =
 +
''Based on ver. 2.2.0-alpha''
  
=== Define location of points ===
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== Line ==
Enter the location of a point by "Absolute" or "Relative" reference (Cartesian coordinates):
+
*'''Absolute''' (''x,y'') is the horizontal (''x'' position), vertical (''y'' position) from origin (0,0).
+
  
*'''Relative''' (''@x,y'') is the horizontal (''x'' distance), vertical (''y'' distance) from current or selected point.
+
'''2 points''' {DrawLine}: Draw a line between two assigned points.
  
 +
'''Angle''' {DrawLineAngle}: Draw a line from an assigned point defining the start, middle or end of the line and with an assigned length and angle.
  
'''Length and Angle''': (''@l<d'') is the distance or length (''l'') and the angle in degrees from zero (''d'') from the current or selected point (polar coordinates).
+
'''Horizontal''' {DrawLineHorizontal): Draw a horizontal line from an assigned point defining the start, middle or end of the line and with an assigned length.
  
 +
'''Vertical''' {DrawLineVertical}: Draw a vertical line from an assigned point defining the start, middle or end of the line and with an assigned length.
  
Note that:
+
'''Freehand Line''' {DrawLineFree}: Draw a non-geometric line.
{| border=0
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|-
+
  !
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  ! Degrees
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  !
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  ! Direction
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|-
+
  |
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  | 0 (or 360)
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  |
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  | is Right
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|-
+
  |
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  | 90
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  |
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  | is Up
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|-
+
  |
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  | 180
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  |
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  | is Left
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|-
+
  |
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  | 270
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  |
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  | is Down
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|}
+
  
== Line ==
+
'''Parallel through point''' {DrawLineParallelThrough}: Draw a given number of lines parallel to a selected existing line through an assigned point.
  
'''2 points''': Draw a line between two points (x,y) (x,y).
+
'''Parallel''' {DrawLineParallel}: Draw a given number of lines parallel to a selected existing line with a given distance between lines.
  
'''Angle''': Draw a line
+
'''Rectangle''' {DrawLineRectangle}: Draw a rectagle by assigning the points of two diagonally opposite corners.
  
'''Horizontal''': Draw a line
+
'''Bisector''' {DrawLineBisector}: Draw a given number of lines bisecting two existing non-parallel lines (e.g. at an angle to each other with or without a common point).
  
'''Vertical''': Draw a line  
+
'''Tangent (P,C)''' {DrawLineTangent1}: Draw a line from an assigned point tangent to an existing circle.
  
'''Rectangle''': Draw a line  
+
'''Tangent (C,C)''' {DrawLineTangent2}: Draw a line tangent to two existing circles.
  
'''Parallel through point''': Draw a line  
+
'''Tangent Orthogonal''' {DrawLineOrthTan}: Draw a line tangent to an existing circle and perpendicular to an existing line.
  
'''Parallel''': Draw a line  
+
'''Orthogonal''' {DrawLineOrthogonal}: Draw a line of a given length perpendicular to an existing line placing the centre at an assigned point.
  
'''Bisector''': Draw a line  
+
'''Relative Angle''' {DrawLineRelAngle}: Draw a line with a given length and at a given angle relative to an existing line placing the centre of the line at an assigned point.
  
'''Tangent (P,C)''': Draw a line
+
'''Polygon (Cen,Cor)''' {DrawPolyline}: Draw a polygon with a given number of sides assigning the centre point and point of one vertex.
  
'''Tangent (C,C)''': Draw a line
+
'''Polygon (Cen,Tan)''' {DrawLinePolygonCenTan}: Draw a polygon with a given number of sides assigning the centre point and point of the centre of one side.
  
'''Tangent Orthogonal''': Draw a line
+
'''Polygon (Cor,Cor)''' {DrawLinePolygonCorCor}: Draw a polygon with a given number of sides assigning the two points of one side.
  
'''Orthogonal''': Draw a line
+
== Circle ==
  
'''Relative Angle''': Draw a line
+
'''Centre, Point''' {DrawCircle}: Draw a circle with a given radius by assigning a centre point and a point on the circumference.
  
'''Polygon (Cen,Cor)''': Draw a line
+
'''Centre, Radius''' {DrawCircleCR}: Draw a circle with a given radius centred at an assigned point.
  
'''Polygon (Cen,Tan)''': Draw a line
+
'''2 Points''' {DrawCircle2P}: Draw a circle with a given diameter by assigning two opposite points on the circumference.
  
'''Polygon (Cor,Cor)''': Draw a line
+
'''2 Points, Radius''' {DrawCircle2PR}: Draw a circle with two points on the circumference and with an assigned radius.
  
== Circle ==
+
'''3 Points''' {DrawCircle3P}: Draw a circle assigning three points on the circumference.
  
'''Centre, Point''': Draw a circle with a radius defined by specifying the centre (x,y) and a point (x,y) on the circumference.
+
'''Concentric''' {DrawCircleParallel}: Draw a circle concentric, with the same centre point, to an existing circle.
  
'''2 Points''': Draw a circle with a diameter defined by specifying two points (x,y) (x,y).
+
'''Circle Inscribed''' {DrawCircleInscribe}: Draw a circle inside an existing polygon of four sides or more.
  
'''2 Points, Radius''': Draw a circle with two points (x,y) (x,y) on the circumference and with a specified radius (length).  
+
'''Tangential 2 Circles, Radius''' {DrawCircleTan2}: Draw a circle tangential to two circles with a given radius.
  
'''3 Points''': Draw a circle with the  
+
'''Tangential, 2 Circles, 1 Point''' {DrawCircleTan2_1P}: Draw a circle tangential to two existing circles and assigning a centre point to establish the radius.
  
'''Centre, Radius''': Draw a circle with the  
+
'''Tangential, 2 Points''' {DrawCircleTan2}: Draw a circle tangential to an existing circle and define the diameter and placement by assigning two points on the circumference.
  
'''Tangential, 2 Circles, 1 Point''': Draw a circle with the
+
'''Tangential, 2 Circles, Radius''' {DrawCircleTan2}: Draw a circle tangential to two existing circles with a given radius.
  
'''Tangential, 2 Points''': Draw a circle with the
+
'''Tangential, 3 Circles''' {DrawCircleTan3}: Draw a circle tangential to three existing circles and/or lines.
 
+
'''Tangential, 2 Circles, Radius''': Draw a circle with the
+
 
+
'''Tangential, 3 Circles''': Draw a circle with the
+
  
 
== Curve ==
 
== Curve ==
  
'''Centre, Point, Angles''':
+
'''Center, Point, Angles''' {DrawArc}: Draw a curve (arc) with a given radius defined by a center point and a point on the circumference, the direction of rotation (clockwise or counter-clockwise), a point defining the start position of the arc and a point defining the end position of the arc.
  
'''3 Points''':
+
'''3 Points''' {DrawArc3P}: Draw a curve (arc) by assigning three points on the circumference of the arc defining the start position, a point on the circumference and end position of the arc.
  
'''Arc Tangential''':
+
'''Concentric''' {DrawArcParallel}: Draw a curve (arc) concentric, with the same centre point, to an existing curve (arc) with a defined offset.(*)
  
'''Spline''':
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'''Arc Tangential''' {DrawArcTangential}: Draw a curve (arc) tangential to the end of an exsiting line segment with a defined radius or angle (deg).
  
'''Spline through points''':
+
== Ellipse ==
  
'''Ellipse Arc (Axis)''':
+
'''Ellipse (Axis)''' {DrawEllipseAxis}: Draw an ellipse by assigning a centre point, a point on the circumference of major access and a point on the circumference the minor access.
  
'''Freehand Line''':
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'''Ellipse Arc (Axis)''' {DrawEllipseArcAxis}: N/A
  
== Ellipse ==
+
'''Ellipse Foci Point''' {DrawEllipseFociPoint}: Draw an ellipse by assigning two foci points and a point  on the circumference.
  
'''Axis''':
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'''Ellipse 4 Point''' {DrawEllipse4Points}: Draw an ellipse assigning four points on the circumference.
  
'''Foci Point''':
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'''Ellipse Center and 3 Points''' {DrawEllipseCenter3Points}: Draw an ellipse by assigning a centre point three points on the circumference.
  
'''4 Points''':
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'''Ellipse Inscribed''' {DrawEllipseInscribe}: Draw a Ellipse constrained by four existing non-parallel line segments.
  
'''Center, 3 Points''':
+
== Spline ==
  
'''Inscribe''':
+
'''Spline''' {DrawSpline}: Draw an open or closed spline (curve) by assigning control points and a given degree of freedom (1 - 3).
 +
 
 +
'''Spline through points''' {DrawSplinePoints}: Draw an open or closed spline (curve) by defining points on the spline.
  
 
== Polyline ==
 
== Polyline ==
 +
 +
'''Polyline''' {DrawPolyline}: Draw an open or closed continuous line consisting of one or more straight line or arc segments defined by endpoints and / or radius or angle for arcs.
 +
 +
'''Add node''' {PolylineAdd}: Add node to existing polyline. (Use "Snap on Entity" to place new node on segment.)
 +
 +
'''Append node''' {PolylineAppend}: Add one or more segments to an existing polyline by selecting polyine and adding new node endpoint.
 +
 +
'''Delete node''' {PolylineDel}: Delete selected node of an existing polyline.
 +
 +
'''Delete between two nodes''' {PolylineDelBetween}: Delete one or more nodes between selected nodes of an existing polyline.
 +
 +
'''Trim segments''' {PolylineTrim}: Extend two seperate non-parallel segments of an existing polyline to intersect at a new node.
 +
 +
'''Create Equidistant Polylines''' {PolylineEquidistant}: Draw a given number of polylines parallel to a selected existing polyline with a given distance between lines.
 +
 +
'''Create Polyline from Existing Segments''' {PolylineSegment}: Create polyline from two or more existing seperate line or arc segments forming a continuous line.
  
 
== Select ==
 
== Select ==
 +
 +
'''Select Entity''' {SelectSingle}: Select, or deselect, one or more entities (default cursor action).
 +
 +
'''Select Window''' {SelectWindow}: Select one or more enties enclosed by selection window (L to R), or crossed by selection window (R to L) (default cursor "drag" action).
 +
 +
'''Deselect Window''' {DeselectWindow}: Deselect one or more enties enclosed by selection window (L to R), or crossed by selection window (R to L).
 +
 +
'''(De-)Select Contour''' {SelectContour}: Select or deselected entities connected by shared points.
 +
 +
'''Select Intersected Entities''' {SelectIntersected}: Select on or more entities crossed by selection line.
 +
 +
'''Deselect Intersected Entities''' {DeselectIntersected}: Deselect on or more entities crossed by selection line.
 +
 +
'''(De-)Select Layer''' {SelectLayer}: Select or deselected all entities on the layer of the selected entity.
 +
 +
'''Select All''' {SelectAll}: Select all entities on visible layers ([Ctrl]-[A]).
 +
 +
'''Deselect all''' {DeselectAll}:  Deselect all entities on visible layers ([Ctrl]-[K] or default [Esc] action).
 +
 +
'''Invert Selection''' {SelectInvert}: Select all un-selected entities will deselecting all selected entities.
  
 
== Dimension ==
 
== Dimension ==
 +
 +
'''Aligned''' {DimAligned}: Apply dimension lines and text aligned to an existing entity by selecting start and end points on a line segment and placement point for the text.
 +
 +
'''Linear''' {DimLinear}: Apply dimension lines and text at an defined angle to an entity by selecting start and end points on a line segment and placement point for the text.
 +
 +
'''Horizontal''' {DimLinearHor}: Apply dimension lines and text aligned to an entity by selecting start and end points on a line segment and placement point for the text.
 +
 +
'''Vertical''' {DimLinearVer}: Apply dimension lines and text aligned to an entity by selecting start and end points on a line segment and placement point for the text.
 +
 +
'''Radial''' {DimRadial}: Apply dimension lines and text a circle's or arc's radius by selecting entity and placement point for the text.
 +
 +
'''Diametric''' {DimDiametric}: Apply dimension lines and text a circle's or arc's diameter by selecting entity and placement point for the text.
 +
 +
'''Angular''' {DimAngular}: Apply angular dimension by selecting two existing non-parallel line segments and placement point for the text.
 +
 +
'''Leader''' {DimLeader}: Draw a text leader by by selecting start (arrow location), intermediate and end points.
  
 
== Modify ==
 
== Modify ==
 +
'''Attributes''' {ModifyAttributes}: Modify the common attributes of '''''one or more''''' selected entities, including Layer, Pen color, Pen width, and Pen Line type.
  
 +
'''Delete''' {ModifyDelete}:  Mark one or more entities to be deleted, press [Enter] to complete operation.
  
=== Attributes ===
+
'''Delete selected''' {ModifyDeleteQuick}: Delete one or more selected entities.
  
Allows for modifying the common attributes of the selected entities.
+
'''Delete Freehand''' {ModifyDeleteFree}: Delete segment within a polyline define by two points. (Use "Snap on Entity" to place points.)
  
=== Properties ===
+
'''Move / Copy''' {ModifyMove}: Move a selected entity by defining a reference point and a relative target point. Optionally keep the original entity (Copy), create mulitple copies and / or alter attributes and layer.
  
Allows for the modification of an entity's properties.
+
'''Revert direction''' {ModifyRevertDirection}: Swap start and end points of one or more selected entities.
 +
 
 +
'''Rotate''' {ModifyRotate}: Rotate a selected entity around a rotation point, moving the entity from a reference point to a target point. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.
 +
 
 +
'''Scale''' {ModifyScale}: Increase or decrease the size of a selected entity from a reference point by a defined factor for both axis.  Optionally keep the original entity, create mulitple copies and / or alter attributes and layer.
 +
 
 +
'''Mirror''' {ModifyMirror}: Create a mirror image of a selected entity around an axis defined by two points.  Optionally keep the original entity and / or alter attributes and layer.
 +
 
 +
'''Move and Rotate''' {ModifyMoveRotate}: Move a selected entity by defining a reference point and a relative target point and rotataing the entity at a given angle.  Optionally keep the original entity, create mulitple copies and / or alter attributes and layer.
 +
 
 +
'''Rotate Two''' {ModifyRotate2}: Rotate a selected entity around an absolute rotation point, while rotating the entity around a relative reference point to a target point. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.
 +
 
 +
'''Stretch''' {ModifyStretch}: Move a selected portion of a drawing by defining a reference point and a relative target point.
 +
 
 +
'''Bevel''' {ModifyBevel}: Create a sloping edge between two intersecting line segments with defined by a setback on each segment.
 +
 
 +
'''Fillet''' {ModifyRound}: Create a rounded edge between two intersecting line segments with defined radius.
 +
 
 +
'''Explode Text into Letters''' {ModifyExplodeText}: Separate a string of text into individual character entities.
 +
 
 +
'''Explode''' {BlocksExplode}: Separate one or more selected blocks into individual entities.
  
 
== Info ==
 
== Info ==
  
== Other ==
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'''Point inside contour''' {InfoInside}: Provides indication of point being inside or outside of the selected ''closed'' contour (polygon, circle, ployline, etc).
  
=== MText ===
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'''Distance Point to Point''' {InfoDist}: Provides distance, cartesian and polar coordinates between two specified points.
  
=== Text ===
+
'''Distance Entity to Point''' {InfoDist2}: Provides shortest distance selected entity and specified point.
  
=== Hatch ===
+
'''Angle between two lines''' {InfoAngle}: Provides angle between two selected line segments, measured counter-clockwise.
  
=== Points ===
+
'''Total length of selected entities''' {InfoTotalLength}: Provides total length of one or more selected entities (length of line segment, circle circimference, etc).
 +
 
 +
'''Polygonal Area''' {InfoArea}: Provides area of polygon defined by three or more specified points.
 +
 
 +
== Misc ==
 +
 
 +
'''MText''' {DrawMText}: Insert multi-line text into drawing at a specified base point.  Optionally define font, text height, angle, width factor, alignment, angle, special symbols and character set.
 +
 
 +
'''Text''' {DrawText}: Insert single-line text into drawing at a specified base point.  Optionally define font, text height,  alignment, angle, special symbols and character set.
 +
 
 +
'''Hatch''' {DrawHatch}: Fill a closed entity (polygon, circle, polyline, etc) with a defined pattern or a solid fill.  Optionally define scale and angle.
 +
 
 +
'''Insert Image''' {DrawImage}: Insert an image, bitmapped or vector, at a specified point.  Optionally define angle, scale factor and DPI.
 +
 
 +
'''Points''' {DrawPoint}: Draw a point at the assigned coordinates.
  
 
== Related ==
 
== Related ==
 +
 +
Points: http://wiki.librecad.org/index.php/Points
 +
 +
Snapping: http://wiki.librecad.org/index.php/Snapping
  
 
http://wiki.librecad.org/index.php/Category:Tools
 
http://wiki.librecad.org/index.php/Category:Tools
 +
 +
http://wiki.librecad.org/index.php/Commands
  
 
http://wiki.librecad.org/index.php/A_short_manual_for_use_from_the_command_line
 
http://wiki.librecad.org/index.php/A_short_manual_for_use_from_the_command_line
  
http://wiki.librecad.org/index.php/Commands
+
http://wiki.librecad.org/index.php/User_Interface
 +
 
 +
http://wiki.librecad.org/index.php/LibreCAD_users_Manual
  
http://wiki.librecad.org/index.php/Snapping
+
[[Category:Tools]]
 +
[[Category:Usage]]

Latest revision as of 23:57, 17 December 2017

Tools Menu

Based on ver. 2.2.0-alpha

Line

2 points {DrawLine}: Draw a line between two assigned points.

Angle {DrawLineAngle}: Draw a line from an assigned point defining the start, middle or end of the line and with an assigned length and angle.

Horizontal {DrawLineHorizontal): Draw a horizontal line from an assigned point defining the start, middle or end of the line and with an assigned length.

Vertical {DrawLineVertical}: Draw a vertical line from an assigned point defining the start, middle or end of the line and with an assigned length.

Freehand Line {DrawLineFree}: Draw a non-geometric line.

Parallel through point {DrawLineParallelThrough}: Draw a given number of lines parallel to a selected existing line through an assigned point.

Parallel {DrawLineParallel}: Draw a given number of lines parallel to a selected existing line with a given distance between lines.

Rectangle {DrawLineRectangle}: Draw a rectagle by assigning the points of two diagonally opposite corners.

Bisector {DrawLineBisector}: Draw a given number of lines bisecting two existing non-parallel lines (e.g. at an angle to each other with or without a common point).

Tangent (P,C) {DrawLineTangent1}: Draw a line from an assigned point tangent to an existing circle.

Tangent (C,C) {DrawLineTangent2}: Draw a line tangent to two existing circles.

Tangent Orthogonal {DrawLineOrthTan}: Draw a line tangent to an existing circle and perpendicular to an existing line.

Orthogonal {DrawLineOrthogonal}: Draw a line of a given length perpendicular to an existing line placing the centre at an assigned point.

Relative Angle {DrawLineRelAngle}: Draw a line with a given length and at a given angle relative to an existing line placing the centre of the line at an assigned point.

Polygon (Cen,Cor) {DrawPolyline}: Draw a polygon with a given number of sides assigning the centre point and point of one vertex.

Polygon (Cen,Tan) {DrawLinePolygonCenTan}: Draw a polygon with a given number of sides assigning the centre point and point of the centre of one side.

Polygon (Cor,Cor) {DrawLinePolygonCorCor}: Draw a polygon with a given number of sides assigning the two points of one side.

Circle

Centre, Point {DrawCircle}: Draw a circle with a given radius by assigning a centre point and a point on the circumference.

Centre, Radius {DrawCircleCR}: Draw a circle with a given radius centred at an assigned point.

2 Points {DrawCircle2P}: Draw a circle with a given diameter by assigning two opposite points on the circumference.

2 Points, Radius {DrawCircle2PR}: Draw a circle with two points on the circumference and with an assigned radius.

3 Points {DrawCircle3P}: Draw a circle assigning three points on the circumference.

Concentric {DrawCircleParallel}: Draw a circle concentric, with the same centre point, to an existing circle.

Circle Inscribed {DrawCircleInscribe}: Draw a circle inside an existing polygon of four sides or more.

Tangential 2 Circles, Radius {DrawCircleTan2}: Draw a circle tangential to two circles with a given radius.

Tangential, 2 Circles, 1 Point {DrawCircleTan2_1P}: Draw a circle tangential to two existing circles and assigning a centre point to establish the radius.

Tangential, 2 Points {DrawCircleTan2}: Draw a circle tangential to an existing circle and define the diameter and placement by assigning two points on the circumference.

Tangential, 2 Circles, Radius {DrawCircleTan2}: Draw a circle tangential to two existing circles with a given radius.

Tangential, 3 Circles {DrawCircleTan3}: Draw a circle tangential to three existing circles and/or lines.

Curve

Center, Point, Angles {DrawArc}: Draw a curve (arc) with a given radius defined by a center point and a point on the circumference, the direction of rotation (clockwise or counter-clockwise), a point defining the start position of the arc and a point defining the end position of the arc.

3 Points {DrawArc3P}: Draw a curve (arc) by assigning three points on the circumference of the arc defining the start position, a point on the circumference and end position of the arc.

Concentric {DrawArcParallel}: Draw a curve (arc) concentric, with the same centre point, to an existing curve (arc) with a defined offset.(*)

Arc Tangential {DrawArcTangential}: Draw a curve (arc) tangential to the end of an exsiting line segment with a defined radius or angle (deg).

Ellipse

Ellipse (Axis) {DrawEllipseAxis}: Draw an ellipse by assigning a centre point, a point on the circumference of major access and a point on the circumference the minor access.

Ellipse Arc (Axis) {DrawEllipseArcAxis}: N/A

Ellipse Foci Point {DrawEllipseFociPoint}: Draw an ellipse by assigning two foci points and a point on the circumference.

Ellipse 4 Point {DrawEllipse4Points}: Draw an ellipse assigning four points on the circumference.

Ellipse Center and 3 Points {DrawEllipseCenter3Points}: Draw an ellipse by assigning a centre point three points on the circumference.

Ellipse Inscribed {DrawEllipseInscribe}: Draw a Ellipse constrained by four existing non-parallel line segments.

Spline

Spline {DrawSpline}: Draw an open or closed spline (curve) by assigning control points and a given degree of freedom (1 - 3).

Spline through points {DrawSplinePoints}: Draw an open or closed spline (curve) by defining points on the spline.

Polyline

Polyline {DrawPolyline}: Draw an open or closed continuous line consisting of one or more straight line or arc segments defined by endpoints and / or radius or angle for arcs.

Add node {PolylineAdd}: Add node to existing polyline. (Use "Snap on Entity" to place new node on segment.)

Append node {PolylineAppend}: Add one or more segments to an existing polyline by selecting polyine and adding new node endpoint.

Delete node {PolylineDel}: Delete selected node of an existing polyline.

Delete between two nodes {PolylineDelBetween}: Delete one or more nodes between selected nodes of an existing polyline.

Trim segments {PolylineTrim}: Extend two seperate non-parallel segments of an existing polyline to intersect at a new node.

Create Equidistant Polylines {PolylineEquidistant}: Draw a given number of polylines parallel to a selected existing polyline with a given distance between lines.

Create Polyline from Existing Segments {PolylineSegment}: Create polyline from two or more existing seperate line or arc segments forming a continuous line.

Select

Select Entity {SelectSingle}: Select, or deselect, one or more entities (default cursor action).

Select Window {SelectWindow}: Select one or more enties enclosed by selection window (L to R), or crossed by selection window (R to L) (default cursor "drag" action).

Deselect Window {DeselectWindow}: Deselect one or more enties enclosed by selection window (L to R), or crossed by selection window (R to L).

(De-)Select Contour {SelectContour}: Select or deselected entities connected by shared points.

Select Intersected Entities {SelectIntersected}: Select on or more entities crossed by selection line.

Deselect Intersected Entities {DeselectIntersected}: Deselect on or more entities crossed by selection line.

(De-)Select Layer {SelectLayer}: Select or deselected all entities on the layer of the selected entity.

Select All {SelectAll}: Select all entities on visible layers ([Ctrl]-[A]).

Deselect all {DeselectAll}: Deselect all entities on visible layers ([Ctrl]-[K] or default [Esc] action).

Invert Selection {SelectInvert}: Select all un-selected entities will deselecting all selected entities.

Dimension

Aligned {DimAligned}: Apply dimension lines and text aligned to an existing entity by selecting start and end points on a line segment and placement point for the text.

Linear {DimLinear}: Apply dimension lines and text at an defined angle to an entity by selecting start and end points on a line segment and placement point for the text.

Horizontal {DimLinearHor}: Apply dimension lines and text aligned to an entity by selecting start and end points on a line segment and placement point for the text.

Vertical {DimLinearVer}: Apply dimension lines and text aligned to an entity by selecting start and end points on a line segment and placement point for the text.

Radial {DimRadial}: Apply dimension lines and text a circle's or arc's radius by selecting entity and placement point for the text.

Diametric {DimDiametric}: Apply dimension lines and text a circle's or arc's diameter by selecting entity and placement point for the text.

Angular {DimAngular}: Apply angular dimension by selecting two existing non-parallel line segments and placement point for the text.

Leader {DimLeader}: Draw a text leader by by selecting start (arrow location), intermediate and end points.

Modify

Attributes {ModifyAttributes}: Modify the common attributes of one or more selected entities, including Layer, Pen color, Pen width, and Pen Line type.

Delete {ModifyDelete}: Mark one or more entities to be deleted, press [Enter] to complete operation.

Delete selected {ModifyDeleteQuick}: Delete one or more selected entities.

Delete Freehand {ModifyDeleteFree}: Delete segment within a polyline define by two points. (Use "Snap on Entity" to place points.)

Move / Copy {ModifyMove}: Move a selected entity by defining a reference point and a relative target point. Optionally keep the original entity (Copy), create mulitple copies and / or alter attributes and layer.

Revert direction {ModifyRevertDirection}: Swap start and end points of one or more selected entities.

Rotate {ModifyRotate}: Rotate a selected entity around a rotation point, moving the entity from a reference point to a target point. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.

Scale {ModifyScale}: Increase or decrease the size of a selected entity from a reference point by a defined factor for both axis. Optionally keep the original entity, create mulitple copies and / or alter attributes and layer.

Mirror {ModifyMirror}: Create a mirror image of a selected entity around an axis defined by two points. Optionally keep the original entity and / or alter attributes and layer.

Move and Rotate {ModifyMoveRotate}: Move a selected entity by defining a reference point and a relative target point and rotataing the entity at a given angle. Optionally keep the original entity, create mulitple copies and / or alter attributes and layer.

Rotate Two {ModifyRotate2}: Rotate a selected entity around an absolute rotation point, while rotating the entity around a relative reference point to a target point. Optionally keep the original entity, create multiple copies and / or alter attributes and layer.

Stretch {ModifyStretch}: Move a selected portion of a drawing by defining a reference point and a relative target point.

Bevel {ModifyBevel}: Create a sloping edge between two intersecting line segments with defined by a setback on each segment.

Fillet {ModifyRound}: Create a rounded edge between two intersecting line segments with defined radius.

Explode Text into Letters {ModifyExplodeText}: Separate a string of text into individual character entities.

Explode {BlocksExplode}: Separate one or more selected blocks into individual entities.

Info

Point inside contour {InfoInside}: Provides indication of point being inside or outside of the selected closed contour (polygon, circle, ployline, etc).

Distance Point to Point {InfoDist}: Provides distance, cartesian and polar coordinates between two specified points.

Distance Entity to Point {InfoDist2}: Provides shortest distance selected entity and specified point.

Angle between two lines {InfoAngle}: Provides angle between two selected line segments, measured counter-clockwise.

Total length of selected entities {InfoTotalLength}: Provides total length of one or more selected entities (length of line segment, circle circimference, etc).

Polygonal Area {InfoArea}: Provides area of polygon defined by three or more specified points.

Misc

MText {DrawMText}: Insert multi-line text into drawing at a specified base point. Optionally define font, text height, angle, width factor, alignment, angle, special symbols and character set.

Text {DrawText}: Insert single-line text into drawing at a specified base point. Optionally define font, text height, alignment, angle, special symbols and character set.

Hatch {DrawHatch}: Fill a closed entity (polygon, circle, polyline, etc) with a defined pattern or a solid fill. Optionally define scale and angle.

Insert Image {DrawImage}: Insert an image, bitmapped or vector, at a specified point. Optionally define angle, scale factor and DPI.

Points {DrawPoint}: Draw a point at the assigned coordinates.

Related

Points: http://wiki.librecad.org/index.php/Points

Snapping: http://wiki.librecad.org/index.php/Snapping

http://wiki.librecad.org/index.php/Category:Tools

http://wiki.librecad.org/index.php/Commands

http://wiki.librecad.org/index.php/A_short_manual_for_use_from_the_command_line

http://wiki.librecad.org/index.php/User_Interface

http://wiki.librecad.org/index.php/LibreCAD_users_Manual