Learn how to change Ruler unit in Word, Excel, PowerPoint from default inches to cm, mm, points, picas via Settings, Registry or Group Policy Editor.

The indentation marker in the top ruler of a Microsoft Word document. The Margins menu in Word's Layout tab is expanded. The Custom Margins option in Word's Margins drop-down menu.

Q. I find the Ruler in Word to be a very mysterious function. However, I’m sure it’s a helpful tool—if only I can figure out how to use ...