G mail shortcut

C                                            -   Compose a message

J,K                                        -    Move the cursor to an older or newer conversation

N,P                                        -    Move to the next message or previous message

#                                            -    Delete message

R,A,F                                    -    Reply , reply all , forward

<Tab>,
then <Enter>                        -   Send message

U                                           -   Return to conversation List

S                                            -   Star a message

!                                             -   Report as spam

<Ctrl>-S                                -   Save a draft

O or <Enter>                        -   Open a selected conversation

/                                             -   Move the cursor to the search bar

M                                          -   Mute a conversation, unless a message is sent directly to you

+or -                                      -   mark a conversation as important or unimportant

<Esc>                                    -   Escape from input field

V                                            -  Move the conversation to a different label

<Shift>-I or U                       -   Mark a conversation as read or unread

.                                             -   Show more action

?                                            -   Show Keybord shortcuts help