What if Thunderbird mail client Apple can't modify the font color?

1. First find "Settings" in Thunderbird mail client, and click "Settings" to enter the settings page.

2. Secondly, on the "Settings" page, you can see "Display and Brightness", where you can adjust various displays of Apple's mobile phone.

3. Then click the "Font Style" option inside, and click Modify Color. Mozilla Thunderbird is a very useful email client.