Switch to the previous window.
ALT+SHIFT+TAB
Close the active window.
CTRL+W or CTRL+F4
In the Browse PowerPoint Help section of the Help window, expand or collapse the selected item, respectively.
ENTER
Select the previous hidden text or hyperlink.
SHIFT+TAB
Reverse the last command or to delete the last entry that you typed.
CTRL+Z
Repeats the last command or action, if possible.
F4
Toggle between full-screen and regular views of the browser window
F11
Show formulas
Ctrl ~
Go to the previous page
ALT+LEFT ARROW or BACKSPACE
Open a new website or page
CTRL+O
Add a Quick Flag to an unopened message.
INSERT
Forward Email
CTRL+F
Check spelling.
F7