Can you change this AFTER you have created the rectangle or square?
Or can you only change the border size before drawing it?
In either case, I read something that says select the tool, then select Edit->Stroke to set the stroke pixel size... but when I do this Stroke is grayed out... If I draw the rectangle and then try to select the stroke it is still greyed out.
I know this is something simple but I just can't figure it out. Urgent not difficult. 500 pts bounty.