What is Ruler in Computer?
Published: 10 Jan 2026
A ruler in a computer is a digital measurement tool used in software applications to help users align and measure text, images, and other objects on the screen. Unlike a physical ruler, it appears on the top or side of the workspace and is mainly used for formatting and layout control.
The ruler is commonly found in word processing programs like Microsoft Word and Google Docs, as well as in graphic design and page layout software. It allows users to set margins, adjust indents, place tabs, and align content accurately.
Rulers can be horizontal or vertical and usually measure in units such as inches, centimeters, pixels, or points. By using the ruler, documents look more organized, professional, and visually balanced.
In simple words, the ruler helps users control spacing and alignment, making document creation easier and more precise.
How to Enable (Show) the Ruler in WordPad
- Open WordPad
- Click on the View tab at the top of the page in the ribbon or menu bar,
- Check the box labeled Ruler
➡️ The ruler will appear at the top of the document.
How to Disable (Hide) the Ruler in WordPad
- Go to the View tab at the top of the page in the ribbon or menu bar,
- Uncheck the Ruler option
➡️ The ruler will disappear from the screen.
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- Be Respectful
- Stay Relevant
- Stay Positive
- True Feedback
- Encourage Discussion
- Avoid Spamming
- No Fake News
- Don't Copy-Paste
- No Personal Attacks
