Hi Frederick,

re:
> For example, could the line command use one of those keys to determine
> if the line is drawn in both directions from the starting point.

It is possible for a command to check if the control key was down when the point pick was finished.

There isn't currently a way for it to be checked on every mouse move though, just when it is done.

I've attached a modified version of the regular line command that will do a "both sides" line if the control key was held down for the 2nd point pick.

- Michael