File tool bar (top)
New - will start a new LibreCAD file document/drawing.
Open - will open a saved drawing.
Save - will open ' Save Drawing As ' dialog and give you file formats to save to.
Print - will open up the print dialog window.
Print Preview - will open up the print preview , re-selecting this button will return you to Model space (drawing area).
Save As - will give you the option to save the current/existing drawing to a new file name and format.
Export As - options to export to .png, .jpg, .bmp, .svg etc...
Import - options to import, Insert Image, Block, read ascii points, shape file.
Undo - undo the last command, one step back.
Redo -redo the last command, step forward.