Create A Composite Layer
If you have a multilayer composition and you
want to apply an effect to all the layers at once, don’t flatten the layers–use a composite layer instead. Hide the layers you want excluded, and press Shift-Command-Option-E (PC: Shift-Ctrl-Alt-E). A new layer will be created at the top containing a merged copy of all the visible layers.
Another option is to create a new layer at the top of the stack and make it active. Command-click (PC: Ctrl-click) each layer you want to include to make those layers active, as well. Press Option-Command-E (PC: Alt-Ctrl-E).
by Colin Smith
You know, I have been “doing” Photoshop for years, but just this year I learned the first shortcut, and today I learned the second !!..Thank you… Thinking of all the flattened and duplicates I have made, just to see how an effect would look…. Little practical things are somehow overlooked–at least I had not found a place that has all-time good tips before. I have some unanswered questions, that I still haven’t found out….??
plz tell me another way..the shortcut key ctrl+shift+alt+E is not working on my laptop. im using photoshop cc 2019