Editing Line length in the Properties Box

I am new to DraftSight but am a fairly experience AutoCAD and Vectorworks user.

I have drawn a line and now I want to modify the length.  Is there a way to modify a line length without having to do the math off the coordinate system?  In short, it would be great to take a line length that is 5'0" long and be able to make it 6'0" by typing it somewhere in the properties dialog.

Thanks in advance!