Top (unknown) keyboard shortcuts in Android Studio

https://codeburst.io/top-unknown-keyboard-shortcuts-in-android-studio-7b1bf833c9f1

1. 1. Toggle case

      macOS: Cmd + Shift + U
      Windows: Ctrl + Shift + U
      

   2. Rectangle selection

      macOS: alt + make selection
      Windows: alt + make selection
      

   3. Clipboard history

      macOS: Cmd + Shift + V
      Windows: Ctrl + Shift + V
      

   4. Duplicate/remove whole line

      For removing line:
      macOS: Cmd + Backspace
      Windows: Ctrl + Y
      For duplicating:
      macOS: Cmd + D
      Windows: Ctrl + D