Stretch Command
I find the STRETCH command to be very useful, when you edit objects. With this command it is easy to change the dimensions of multiple lines, a rectangle or triangle. Use a crossing polygon by typing CP to select multiple objects, then stretch them to a desired location. When specifying second point: I moved the mouse in the desired direction, then type the distance and press enter. Remember, ORTHO must be on. If you wan't to do a diagonal stretch, then use Polar Tracking. Procedure: Press F10, then right click on Polar Tracking in the status bar, next click "settings". Set increment angle to a specific angle. Now do the stretch command as described above.