Paintstormstudio.com

OK... I see we can constrain an elliptical selection to being a circle by holding down the Control key on the Mac, but how do we constrain a rectangular selection to be a square? I've tried every modifier key I can think of, but can't find a way to draw a perfectly square selection.
Help please?
T

Use "chain" icon at the tool-options panel

mmmmm...this is really nice to know it!! thanks a lot both for asking and for the right answer
Rosa