To turn on backlighting, tap the Increase brightness button. To turn it off, tap and hold the Decrease brightness button, which looks like a half-circle outlined in dots, not rays.

Learn how to turn on or off File validation in Word, Excel, and PowerPoint. Enable or disable it using Registry or Group Policy Editor.

Excel's new Copilot function turns your prompts into formulas - how to try it It's so much easier to create, summarize, and analyze data now - no complex manual formulas required.