Action Mac shortcut Windows shortcut
Archive a message
Command–Down Arrow
Control–Down Arrow
Bold
Command-B
Control-B
Compose a new email
Option-Shift-N
Alt-Shift-N
Delete a selected message or folder
Delete
Backspace
Flag or unflag email
Shift-Command-L
Control-Shift-L
Indent items in a list
Command–Right Bracket
Control–Right Bracket
Italic
Command-I
Control-I
Make font size bigger
Command–Equal Sign
Control–Equal Sign
Make font size smaller
Command–Minus Sign
Control–Minus Sign
Mark email as Junk or Not Junk
Shift-Command-J
Control-Shift-J
Mark email as Read or Unread
Shift-Command-U
Control-Shift-U
Open the selected message in a new window
Return
Enter
Outdent items in a list
Command–Left Bracket
Control–Left Bracket
Print
Command-P
Control-P
Redo changes to a message
Shift-Command-Z
Control-Y
Reply to sender
Shift-Command-R
Control-Shift-R
Save as a draft
Command-S
Control-S
Scroll through the selected messages
Up or down arrows
Up or down arrows
Select all messages
Command-A
Control-A
Send email
Shift-Command-D
Control-Shift-D
Toggle between Reply and Reply All
Shift-Command-R
Control-Shift-R
Underline
Command-U
Control-U
Undo changes to a message
Command-Z
Control-Z
Note: Keyboard shortcuts may not be available in all countries and regions.
Source: Apple