Press Alt while selecting the block of code with the mouse (boxing).
Press Alt+Shift+Up / Alt+Shift+Down to insert cursor above / below.
Press Ctrl+Alt / Alt and click where you want to add a caret.
Select the word then press Alt+Shift+. / Ctrl+D to select the next occurance.
Select the word then press Alt+Shift+; / Ctrl+Shift+L to select all occurances.
Search Ctrl+T / Ctrl+P
Comment/Uncomment Ctrl+K, Ctrl+C / Ctrl+K, Ctrl+U
Format Document / Selection Ctrl+K, Ctrl+D / Ctrl+K, Ctrl+F
Move Code Up / Down Ctrl+Up / Ctrl+Down
Rename Ctrl+R, Ctrl+R
Quick Actions / Refactoring Suggestions Alt+Enter or Ctrl+.