Posted by LordOfBikes on Nov 28, 2014; 10:24am
URL: https://forum.librecad.org/Issues-with-Rotate-Select-Layer-Specifying-length-of-line-tp5710679p5710773.html

Sorry for confusion.

OK, you don't want to know the actual length, you want to shorten/lengthen the line after it's drawn.

There is no tool for that now. You can use Lengthen tool from Modify tool bar, but there you can only specify how much the line would be lengthen, not the final length.

The syntax Neal described is for drawing time. Use tool to draw a line with two points.
In the command line enter start point e.g. 100,100 and then enter @100<45 to draw a line 100 units long and an angle of 45, starting at 100,100

Armin