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Font size set with layout.css.devPixelsPerPx to 12 - now giant fonts, cannot change it back

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On my old small laptop I wanted to increase interface font size. Erroneously thought that in layout.css.devPixelsPerPx I could insert the desired font size. I have inserted 12, now Thunderbird is unusable, some giant menu words appear but I cannot move anywhere. Can I I edit a configuration file manually to reset to a readable size? Which?

On my old small laptop I wanted to increase interface font size. Erroneously thought that in layout.css.devPixelsPerPx I could insert the desired font size. I have inserted 12, now Thunderbird is unusable, some giant menu words appear but I cannot move anywhere. Can I I edit a configuration file manually to reset to a readable size? Which?

Solusi terpilih

I found the solution myself. It is the file prefs.js containing the info. I changed the value for layout.css.devPixelsPerPx back -1.0 and Thunderbird worked again as before. Great sigh of relief.....

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Solusi Terpilih

I found the solution myself. It is the file prefs.js containing the info. I changed the value for layout.css.devPixelsPerPx back -1.0 and Thunderbird worked again as before. Great sigh of relief.....

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