Just a handfull of the keys, that exist, and you can always adjust short cuts to your own liking in the programs too.
But these are some of the ones I use the most myself. Found their equals for Mac too, so thought I might as well post that.
Shortcuts - Photoshop
Merge visible Layers
MAC: Cmd+Shift+E
WINDOWS: Ctrl+Shift+E
Invert selection
MAC: Cmd+Shift+I
WINDOWS: Ctrl+Shift+I
Select all layers
MAC: Cmd+Opt+A
WINDOWS: Ctrl+Alt+A
Deselect the entire image
MAC: Cmd+D
WINDOWS: Ctrl+D
Select a colour from an image (color picking)
MAC: Opt+Brush Tool
WINDOWS: Alt+Brush Tool
Increase/decrease brush s
Man the deviant art app is really weird to use it always messes with the upload quality I finally figured out that I have to upload my art from the web and not my phone >_< also I found out you can edit the quality of the picture too once it’s been u...
Hellu! Guess who’s back from the dead again >_< I’m gonna try to post more soon. If you wanna check out more of my work visit my IG account: @Candice_Doodlez