Drawing Questions

1- Is there a way to hit a hot key (Possibly "Shift") and lock the line you are drawing so that it is impossible for it to go any direction from straight, no left to right or up and down movement. And then quickly hit that hot key again to unlock it? This option will speed up your drawing and accuracy.

2- Can you change the width of any line you are drawing. For instances preset a 24" footing line to 24" or a 5-1/2" wood framing wall to 5-1/2" also with an option to make the line thin, medium and thick? This gives you a better looking takeoff and also allows you to quickly double check that you picked the correct pre-set footing / wall width.