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increase font size of incoming messages

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I am using Thunderbird 78.10.2. I cannot figure out how to increase the font size of incoming messages.

I am using Thunderbird 78.10.2. I cannot figure out how to increase the font size of incoming messages.

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What are your font settings? At the top right of the Thunderbird window, click the menu button > Options > General > Language & Appearance > Fonts & Colors > Advanced

Please post a screenshot of your settings. https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem