The Settings page closes and you return to the Inbox.
Once keyboard shortcuts have been enabled, a blue vertical bar appears next to the top email in your inbox; this bar indicates which email will be affected by whichever keyboard shortcut you use.
Once keyboard shortcuts are enabled, you can start using shortcut keys. You can see even more keyboard shortcuts in Gmail by pressing ? (Shift + /) while in your Inbox.
The following table lists some common actions you can perform in your Inbox or other email lists, and their keyboard shortcuts.
Action
Shortcut
Select Conversation
X
Open Message
O
Toggle Star
S
Archive
E
Delete
#
Mute Conversation
M
Reply
R
Forward
F
Mark as Read
Shift + I
Mark as Unread
Shift + U
Return to List
U
You can also jump directly to your Inbox, other lists, by pressing the G key followed by the appropriate shortcut key.