4DThinker wrote:Adding a node works if drawing a line from an existing line. So far no trick I've found works for drawing TO a line from a random point, or through an existing line.
You can do it (must have a node or mid-point reference).
Draw a line at any angle (random if you wish). If you want a new perpendicular line THROUGH or TO any reference point that you have on your first line, you can by doing the following:
1) Hover your line cursor over your reference point and move AWAY from that reference point. You will see a dotted line and ultimately a square symbol indicating a 90° angle to the existing line.
2) From your desired AWAY location, click to start your line and move your cursor THROUGH or TO the reference point to whatever end location you want, and click to end your new line
Just takes a little practice to get the hang of it.