rectangle frustration (or any shape)

[bbxrider]

thanks for the comprehensive reply, that last tutorial is sort of hard to follow, goes too fast for me, like the layer group creation, seems a blur of clicks and cursor moves and then bingo a new group is there, not exactly sure how and why, but got some ideas from it, for precise resizing of the rectangle having good luck with the scale tool, now that I noticed the lock icon, so the width and height can be adjusted separately