We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

change font size of panels

  • 2 valiny
  • 1 manana an'ity olana ity
  • 17 views
  • Valiny farany nomen'i Alex Hauf

more options

Hello,

how can I change the font size of the folders (sidebar) and the Email list in Thunderbird? I was only able to change the size of the EMail displayed.

Thank you for your help

Hello, how can I change the font size of the folders (sidebar) and the Email list in Thunderbird? I was only able to change the size of the EMail displayed. Thank you for your help

Vahaolana nofidina

There is a setting that can change all of the Thunderbird UI. Folder Pane, Thread Pane, Menus, Emails etc.

  • 'Menu icon (3 lines) > Options > Options > Advanced > 'General' tab
  • click on 'Config Editor' button

It may say 'here be dragons' as a type friendly warning to be careful :)

  • In top search type: pixels
  • Look for this line: layout.css.devPixelsPerPx

The default is -1.0

  • Double click on that line to open a small window.
  • clear contents and type in eg: 1.5 or 1.75 or 2.0 or 2.25 etc
  • click on OK

You will see instant effects, so try out different sizes eg: 1.5 or 1.75 or 2.0 or 2.25 etc until you get one that suits you.

Hamaky an'ity valiny ity @ sehatra 👍 0

All Replies (2)

more options

Vahaolana Nofidina

There is a setting that can change all of the Thunderbird UI. Folder Pane, Thread Pane, Menus, Emails etc.

  • 'Menu icon (3 lines) > Options > Options > Advanced > 'General' tab
  • click on 'Config Editor' button

It may say 'here be dragons' as a type friendly warning to be careful :)

  • In top search type: pixels
  • Look for this line: layout.css.devPixelsPerPx

The default is -1.0

  • Double click on that line to open a small window.
  • clear contents and type in eg: 1.5 or 1.75 or 2.0 or 2.25 etc
  • click on OK

You will see instant effects, so try out different sizes eg: 1.5 or 1.75 or 2.0 or 2.25 etc until you get one that suits you.

more options

Thank you for your help