Hello everyone. I'm new here. thank you in advance for the help I seek. I'm not a real pro so I'm learning things as I go. I need help with something basic. something I've done many times in other programs but cant figure out how in this program.

I want to draw straight lines (horizontal or vertical) from my mouse from point to point. so the first cross hair is clicked and the second point is clicked and it creates a straight line. OR if I want to create a line draw of a box, circle, etc. just dragging my mouse. can anyone help me please. Thank you