Alternatively called Cmd+U, Command+U is a keyboard shortcut often used to underline text.

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.

On Windows computers, the shortcut for underline Ctrl+U.

  • How to use the Command+U keyboard shortcut.
  • Command+U in an Internet browser.
  • Command+U with word processors and text.
  • Command+U in Microsoft Excel and other spreadsheet programs.
  • Command+U in Microsoft PowerPoint.
  • Related keyboard shortcuts and keys.
  • Related information.
  • Computer keyboard shortcuts.

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.

  • Firefox shortcuts

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.

  • Full list of Excel shortcuts.
  • Google Sheets shortcuts.

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.

  • Full list of PowerPoint shortcuts.

Below are links to related keyboard shortcuts and individual key pages.

  • Command

Cmd, Keyboard shortcut, Keyboard terms, U, Underline

  • How to view the HTML source code of a web page.
  • Computer keyboard shortcuts.
  • Top 10 keyboard shortcuts everyone should know.
  • Keyboard help and support.