Adobe Photoshop : Some most usable Shortcut Keys

Shortcut Keys	Functions
Windows : Control + T macOS : Command + T	Free Transform
Windows : [ macOS : [	Decrease Brush Size
Windows : ] macOS : ]	Increase Brush Size
Windows : { macOS : {	Decrease Brush Hardness
Windows : } macOS : }	Increase Brush Hardness
Windows : D macOS : D	Default Foreground/Background colors
Windows : X macOS : X	Switch Foreground/Background colors
Windows : Control + J macOS : Command + J	New layer via copy
Windows : Shift + Control + J macOS : Shift + Command + J	New layer via cut
Windows : Any selection tool + Shift-drag macOS : Any selection tool + Shift-drag	Add to a selection
Windows : Alt-click brush or swatch macOS : Option-click brush or swatch	Delete brush or swatch
Windows : Control-click macOS : Command-click	Toggle auto-select with move tool
Windows : Escape macOS : Escape	Cancel any modal dialog window (including the Start Workspace)
Windows : Enter macOS : Return	Select the first edit field of the tool bar
Windows : Tab macOS : Tab	Navigate between fields
Windows : Tab + Shift macOS : Tab + Shift	Navigate between fields in opposite direction
Windows : Alt macOS : Option	Change Cancel to Reset