Alternatively referred to as Control O and C-o, Ctrl+O is a shortcut key most often used to open a new document, page, URL, or other files.
This page covers the Ctrl+O (letter 'O') shortcut and not the Ctrl+0 (zero) shortcut.
How to use the Ctrl+O shortcut key
On Apple computer keyboards, the Ctrl key is labeled as "control."
Ctrl+O in an Internet browser
In all Internet browsers (e.g., Chrome, Firefox, and Opera), pressing Ctrl+O opens the Open window. From this window, you can choose a file to open on your computer. The file can be any file supported by the browser.
Ctrl+O in Excel and other spreadsheet programs
Ctrl+O in Microsoft PowerPoint
In Microsoft PowerPoint, the Ctrl+O opens the Open window and allows you to select and open an existing presentation on your computer.
Ctrl+O in Word and other word processors
Related keyboard shortcuts
Below are links to related keyboard key and keyboard shortcut pages.