is there a keyboard shortcut to resize the selected area?

[ittayd]

When I zoom, the frame of the selection is not visible, so I can't use the mouse to grab a corner. zooming out means of course it is harder to see whether I resize enough and then zooming in doesn't zoom to where I was before, so I need to scroll. 

[Ego Eram Reputo]

There is no keyboard shortcut that will resize a selection. You need to be able to grab one of the control nubs with the mouse. If you can do that, the arrow keys will move the nub on a per-pixel basis for fine control.

The Zoom Tool is broken at the moment. Have you tried using Ctrl + mouse wheel to zoom in/out on your selection?