Alternatively known as Control 3 and C-3, Ctrl+3 is a shortcut key most often used to switch to the third tab in a browser or another program with tab support.
How to use the Ctrl+3 shortcut key
The "3" used with this shortcut is the "3" at the top of the keyboard and not on the numeric keypad.
Ctrl+3 in Microsoft Excel
You can also use the Ctrl+I shortcut to italicize text in Excel.
Using Ctrl+3 in an Internet browser
If you only have two tabs open, pressing Ctrl+3 does nothing.
Related keyboard shortcuts
Below are links to related keyboard key and keyboard shortcut pages.