Alternatively referred to as Control S and C-s, Ctrl+S is a shortcut key most often used to save changes to a file.
How to use the Ctrl+S shortcut key
On Apple computer keyboards, the Ctrl key is labeled as "control."
Ctrl+S in an Internet browser
In all major Internet browsers (e.g., Chrome, Firefox, Internet Explorer, Opera), pressing Ctrl+S saves a copy of the page being viewed.
Ctrl+S in Excel and other spreadsheet programs
In Microsoft Excel and other spreadsheet programs, pressing Ctrl+S saves the current open worksheet. If the worksheet has never been saved, the Save As window opens to allow you to enter the name of the worksheet.
If you're editing the contents of a cell and press Ctrl+S, nothing will happen.
Ctrl+S in Microsoft PowerPoint
In Microsoft PowerPoint, the Ctrl+S shortcut key saves the open slide deck. The Shift+F12 shortcut key also saves the open slide deck.
Ctrl+S in Word and other word processors
In Microsoft Word and other word processor programs, pressing Ctrl+S saves the current open document. If the document has never been saved, the Save As window opens to allow you to enter the name of the worksheet.
Ctrl+S in WinPopup
In WinPopup, pressing Ctrl+S sends the WinPopup message.
Related keyboard shortcuts
Below are links to related keyboard key and keyboard shortcut pages.