How to Fix Arrow Keys Not Moving Correctly Inside Word Equations
Question details
The user is unable to navigate using the arrow keys while editing mathematical equations in Microsoft Word.

- Product
- Microsoft Word
- Device & OS
- Windows / Laptops
- Scenario
- Typing and editing mathematical equations within a Word document and attempting to move the cursor between equation elements.
- Observed behavior
- The arrow keys fail to move the cursor left, right, up, or down inside the equation, often due to laptop keyboard configurations or software conflicts.
Verify that your arrow keys are physically working by testing them in another application like Notepad or a web browser before troubleshooting Word.
Check Laptop Fn Key and Keyboard Settings
Toggle the Function (Fn) key to ensure secondary keyboard behaviors are not overriding standard arrow key navigation.
On many laptops, the arrow keys share functionality with other media or system controls. Pressing the Fn key might inadvertently lock or unlock these alternate functions, causing the arrow keys to stop responding normally inside complex input fields like Word equations.
Find the 'Fn' key on your laptop keyboard, usually located in the bottom-left corner next to the Ctrl or Windows key.
Press the Fn key once (or press Fn + Esc depending on your laptop model) to toggle the function lock.
Click inside your Microsoft Word equation and attempt to use the left, right, up, and down arrow keys to navigate.

Run Word in Safe Mode to Disable Add-ins
Start Microsoft Word in Safe Mode to determine if a third-party add-in is interfering with keyboard navigation.
Perform a Windows Clean Boot
Use a Clean Boot to start Windows with a minimal set of drivers and startup programs to isolate background software conflicts.
Edit Equations Smoothly with WPS Office
If Microsoft Word continues to have navigation issues, try WPS Office. It provides a robust, free, and lightweight alternative with an intuitive equation editor and seamless compatibility with Microsoft Word documents.
- 1. Download WPS Office: Visit the official WPS website to download the free WPS Office installer.
- 2. Install the software: Run the installer and follow the quick on-screen instructions to set up WPS Office on your computer.
- 3. Open and edit your document: Open WPS Writer, load your existing .docx file, and easily edit your mathematical equations without navigation glitches.

Frequently Asked Questions
Why do my arrow keys scroll the entire page instead of moving the cursor?
This happens when Scroll Lock is accidentally enabled on your keyboard. Look for the 'ScrLk' or 'Scroll Lock' key on your keyboard and press it to toggle the feature off. On some laptops, you may need to press Fn + ScrLk.
How can I check my exact version of Microsoft Word for troubleshooting?
Open Microsoft Word, click on 'File' in the top-left corner, and select 'Account' from the bottom left menu. Your exact version and build number will be listed on the right side under 'Product Information'.
Is it possible that an outdated Word version is causing the equation editor bug?
Yes, Microsoft frequently releases bug fixes for Office applications. Navigate to File > Account > Update Options and click 'Update Now' to ensure you are running the latest version of Word.
What if the arrow keys still do not work after a Clean Boot?
If a Clean Boot and Safe Mode do not resolve the issue, you may want to record a video of the behavior and send it to Microsoft Support, as it could be a specialized bug related to your specific hardware configuration or a corrupted Office installation.




