Thanks again for your reply.
I am still not clear of the purpose of the Favorites or how to use them - you say they "are easily toggleable from the redbox region capture mode" - I have looked in help and forum and cannot find anything on favorites or "red box capture mode".
I think you are saying that you will add code so that wheh I select a preset size I will be able to easily to toggle through the preset sizes - this will be very useful.
My best case procedure would be:
CTRL+SHIFT+(my chosen key) - opens dragable red box, with size from 1st in list - drag + the following options
click to save (same as current)
Numeric keys 1,2,3,4,5, resize red box, drag, click to save
Perhaps this is what you are describing