Photoshop comes with a huge number of shortcuts by default, but if you find that the shortcut for a regular part of your workflow is too cumbersome, or you have memorised shortcuts from another program and would like to use them in Photoshop, you can always create custom shortcuts in Photoshop.
To do so, go to either Edit > Keyboard Shortcuts or Window > Workspace > Keyboard Shortcuts & Menus and click the Keyboard Shortcuts tab. Once there, choose a set of shortcuts from the Set menu at the top of the Keyboard Shortcuts & Menus dialogue box.
Choose a shortcut type from Application Menus (shortcuts for items in the menu bar), Panel Menus, Tools or Taskspaces (this covers the Content-Aware Fill and Select and Mask workspaces). In the Shortcut column of the scroll list, select the shortcut you want to modify and type a new shortcut.
Note that if the shortcut you enter is already assigned to another command, you'll see an alert. Click Accept to assign the shortcut to the new command and erase the previous assignation (you can click Undo Changes to go back if you change your mind). Click Accept and Go To Conflict to assign a new shortcut to the other command. To save all changes to the current set of shortcuts, click 'Save Set'. If you're saving changes to the Photoshop Defaults set, the Save dialogue box opens. Enter a name for the new set and click Save.
For more tools to add to your software, see our pick of the best Photoshop plugins and the best free Photoshop brushes.