Let's say you need 'something' from a source pic. You don't want to change the pic, you just need to use it and leave it the way it was, so yo can use it again! Create an action and assign it a keystroke.
Open any pic.
Create another layer any way you like
Click your actions tab. (window, actions)
Theres a little arrow on the tab pointing right.
click it and select New Action
A dialog will come up
Name it 'Close No Save'
Assign it a function key
click record
Close your picture
An "Are you sure" will come up
click yes
The picture will close with no saves, it is still as it was
Click actions tab again (if necessary)
And hit the 'stop button' on your recorder
Done
Every time I need a pic and have to manipulate it for something else, I do the work and then hit my function key to put the pic back where it was and not save anything I did to it. Very handy!
