Essential Photoshop Shortcut
Why when editing in in Photoshop does it take so many clicks to flatten an image and why have Adobe not add a button or a shortcut!
Here is a way of making your own shortcut for Flattening all layers.
In photoshop you have the ability to create custom keyboard shortcuts
> Keyboard Shortcuts,
set the “Shortcuts For” pull-down menu to Application Menus,
Click the disclosure triangle for “Layers” and add your own custom shortcut.
It will tell you if the one you want to use is already allocated