Ctrl+4
Alternatively written as Control+4, ^4, and C-4, Ctrl+4 is a keyboard shortcut most commonly used to switch to the fourth tab in an Internet browser or other programs with tab support. Below are other programs that use this keyboard shortcut and related information.
How to use the Ctrl+4 keyboard shortcut
To use this keyboard shortcut, press and hold either Ctrl key, and while continuing to hold, press 4.
For this shortcut, you must use 4 above the top row keys, not on the numeric keypad.
Ctrl+4 in Microsoft Excel 2019
In Microsoft Excel 2019, pressing Ctrl+4 toggles the underline text feature on and off for a cell.
You can also use the Ctrl+U shortcut to italicize text in Excel.
Ctrl+4 in an Internet browser
With all major Internet browsers (e.g., Chrome, Edge, Edge, Internet Explorer, Firefox), pressing Ctrl+4 switches to the fourth tab.
Related keyboard shortcuts and keys
Below are links to related keyboard shortcuts and individual key pages.