Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Font size on mailbox window is now too small.  Changing the setting seems to do nothing.

  • 6 àwọn èsì
  • 2 ní àwọn ìṣòro yìí
  • 6 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ sfhowes

Just a very short while ago, Thunderbird updated to 115.3.1 from whatever it was just before that.  This is under 64-bit Windows 10 Pro.

  Now, the font size on the mailbox window is way too small, and I cannot seem to change it.

  Searching through all the settings, I found this one setting that appeared to possibly be relevant, but change it seems to have no effect at all that I can see.

  Is there a relevant setting somewhere else, that I am failing to see?

  The font size was just fine before this latest update.

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2023-10-03-20-39-22-911af7.png

Just a very short while ago, Thunderbird updated to 115.3.1 from whatever it was just before that.  This is under 64-bit Windows 10 Pro.   Now, the font size on the mailbox window is way too small, and I cannot seem to change it.   Searching through all the settings, I found this one setting that appeared to possibly be relevant, but change it seems to have no effect at all that I can see.   Is there a relevant setting somewhere else, that I am failing to see?   The font size was just fine before this latest update. https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2023-10-03-20-39-22-911af7.png

Ọ̀nà àbáyọ tí a yàn

Try View/Font Size from the Menu Bar or the 3-bar AppMenu.

Ka ìdáhùn ni ìṣètò kíkà 👍 2

All Replies (6)

I seem to have somehow double-posted.

  Moderators, please feel free to delete one post, and move any replies to the other.

Ọ̀nà àbáyọ Tí a Yàn

Try View/Font Size from the Menu Bar or the 3-bar AppMenu.

That seems to have done it.

  But a question remains, is why updating to the latest version caused the font size to suddenly become so small in the first place.

I don't know why some users see a sudden change in fonts after the upgrade, as I didn't see it myself. Instead of doing an in-place upgrade, I always install new major releases in a separate directory and create a new profile, leaving the previous release and profile accessible and independent.

And the setting that I did find, to what is that supposed to apply?

  In a quick attempt to make sense of it, I wasn't able to find anywhere that changed according to that setting.

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2023-10-03-20-39-22-911af7.png

I don't know what that settings applies to, but I've never changed it. The important settings are in the Advanced section.