If you do not want Google Slides to underline possible spelling errors in red, open Tools > Spelling and turn off Underline errors. Google says this preference applies across your presentations.
Turn off the red spelling underlines
- Open a presentation in Google Slides on a computer.
- Click Tools.
- Open Spelling.
- Click Underline errors to turn the feature off.
This hides the automatic spelling suggestions as you type. It does not prevent you from running a spell check manually.
Run spell check when you want it
Use Tools > Spelling > Spell check to review potential misspellings on demand. You can accept a suggestion, ignore it, or add a legitimate word to your personal dictionary.
If Slides keeps flagging a correct word
Names, product terms, abbreviations, and specialized vocabulary may not be in the dictionary. Instead of disabling spelling assistance entirely, consider adding frequently used legitimate terms to your personal dictionary.
Autocorrect is a separate feature. If your issue is that Slides changes text rather than merely underlining it, review Tools > Preferences instead.
Matt Jacobs has been working as an IT consultant for small businesses since receiving his Master’s degree in 2003. While he still does some consulting work, his primary focus now is on creating technology support content for SupportYourTech.com.
His work can be found on many websites and focuses on topics such as Microsoft Office, Apple devices, Android devices, Photoshop, and more.