Take the tour ×  Where is the cursor supposed to be before
hitting Cmd + . or Cmd+ , to make them work?  Do I have to press
Cmd and Shift and . ?  I tried it with and without hitting the
Shift key with the cursor in the mail body. Then with the cursor
in the main window.  share|improve this question add comment
migrated from superuser.com Oct 31 at 16:27   2 Answers  You
have to ensure that you have the setting enabled through your
Gmail settings. Go into your gmail settings via the Settings
icon and turn on the option.  Once you have keyboard shortcuts
enabled you should be able to hit a specific key on your
keyboard to execute certain commands. For example, if I want to
compose a new message I would hit the c key. Shift + c would
open that option in a new window. For most of the other commands
you can hit the corresponding key on the keyboard.  Gmail
keyboard shortcuts.  share|improve this answer Yassar Thanks for
your answer. I think I've found the answer to my question ;-) – 
politicus Oct 13 at 14:56 ad