Q: How do I turn off the shadow?
Yes its a useful feature for certain types of work, but it probably shouldn't be the default. There should also be a check box in the Options Bar for this, and maybe a keyboard shortcut toggle also. On high res files it slows things down quite a lot.
There should also be a check box in the Options Bar for this
Errr … there is!
Look further along the Options Bar for the Toggle Button — on the right.
Phil, option+shift only works if you have the overlay option deselected in the clone source panel
Tool settings are always saved after restart
Just to be more specific and clear:
Tool settings are always saved upon an orderly quit of the application.
If the application crashes, tool settings won't be saved and a restart is not going to create them magically.