Change size of text - Thunderbird Version 3
To change the font size for incoming plain text messages, follow these steps:
Go to Thunderbird > Preferences.
![Choose the Preferences option from the Thunderbird Menu](https://media.screensteps.com/image_assets/assets/004/142/198/original/ThunderbirdScreenSnapz002.png)
- Click Display.
- click Advanced...
![Click on Display](https://media.screensteps.com/image_assets/assets/004/142/200/original/media_1261664417824.png)
- If Use fixed width font for plain text messages is selected, set the minimum font size to the smallest font you can comfortably see.
- Click OK.
![If Use fixed width font for plain text messages is selected,](https://media.screensteps.com/image_assets/assets/004/142/202/original/media_1261664662964.png)