Command+U
Alternatively called Cmd+U, Command+U is a keyboard shortcut most commonly used to underline text. Below are other programs that use this keyboard shortcut and related information.
How to use the Command+U keyboard shortcut
To use this keyboard shortcut, press and hold either Command key, and while continuing to hold, press U.
Command+U in an Internet browser
In Firefox, pressing Command+U opens the current page's source code in a new browser tab. For example, you could press Command+U to view the source code of this page.
Command+U with word processors and text
In word processors and text editors, Command+U performs different functions based on highlighting. If no text is highlighted, pressing this keyboard shortcut turns the underline feature on or off at the cursor's location. If text is highlighted, pressing Command+U changes that content's appearance between underlined and not underlined.
Command+U in Microsoft Excel and other spreadsheet programs
In Microsoft Excel and other spreadsheet programs, Command+U performs different functions based on highlighting. If you're working in a cell and no text is highlighted, pressing this keyboard shortcut turns the underline feature on or off at the cursor's location. If text is highlighted, pressing Command+U changes that content's appearance between underlined and not underlined.
Command+U in Microsoft PowerPoint
In Microsoft PowerPoint, Command+U performs different functions based on highlighting. If no text is highlighted, pressing this keyboard shortcut turns the underline feature on or off at the cursor's location. If text is highlighted, pressing Command+U changes that content's appearance between underlined and not underlined.
Related keyboard shortcuts and keys
Below are links to related keyboard shortcuts and individual key pages.