Hi,

Please implement shortcuts for external keyboards to enable seamless navigation through Android apps for Chrome OS Android ProtonMail users, Android tablet or mobile users with keyboards, and those using the upcoming Googlebook Aluminium OS.

Gmail’s keyboard shortcuts are the gold standard for Android external keyboard users. Check out their defaults. https://support.google.com/mail/answer/6594/keyboard-shortcuts-for-gmail-android?co=GENIE.Platform%3DAndroid&oco=1