Thank you for that information, Paul.

How do I get the connection points (the little squares at the opposite end of the arrows) to connect so that the two lines form an angle? And how do I line them up to be 90 degrees (or 45 degrees or whatever)? I still can't seem to control the movement very well, and I'm still relying on my eyeballs to line up the arrows in the table. The gridlines help with that but I don't understand how to utilize the vertical and horizontal values.

BTW, I'm on a PC, not a Mac, if that makes any difference.