This is an old revision of the document!
Thunderbird
Bigger font size
- Menu app icon > Options/Preferences > General
- Scroll down to the very bottom
- click on 'Config Editor' button to open 'about:config'
- Accept the risk.
- In search type: pixels
- Look for this line: layout.css.devPixelsPerPx
- Double left click on that line to open the 'Enter string Value' box so you can edit the Value. The default value will be a negative number: -1.0
- Enter a new positive number eg: 1.25 or 1.5 or 2.0 or 2.2 click on OK .
The effect is immediate, so you can modify that number until it looks ok for you. Image below as guide.
