Alternatively referred to as Control+O and C-o, Ctrl+O is a keyboard shortcut most often used to open a URL, document, image, or other file types.
This page covers the Ctrl+O (letter 'O') shortcut and not the Ctrl+0 (zero) shortcut.
How to use the Ctrl+O keyboard shortcut
Ctrl+O in an Internet browser
In all Internet browsers, pressing Ctrl+O brings up the Open window, which allows you to open a file from your computer.
Ctrl+O in Excel and other spreadsheet programs
Ctrl+O in Microsoft PowerPoint
In Microsoft PowerPoint, the Ctrl+O brings up the Open window, allowing you to load an existing presentation stored on your computer.
Ctrl+O in Word and other word processors
Related keyboard shortcuts and keys
Below are links to related keyboard shortcuts and individual key pages.