Enhance selection

To enchance a selection choose from the following actions:
Selection tools options

Select any selection tool and use the tool's options as follows:

Move selection border

To move a selection border choose use any one of these selection tools and select in Tool's Options palette mode to New.

Refine selection

Edit ‣ Refine Selection
Option ⌥ + Command ⌘ + R

Click to reset values.