2. Then in the pop-up option setting window, click to open the setting of "Stationery and Font" in "Mail Format".

3. In the new window "Signature and Stationery" that pops up, select "Personal Stationery". You can see that the choice of "font" is "use the font in the body". At this time, the font under the new mail, reply or forward mail is set to gray, so it cannot be operated.

4. Then in the signature and stationery window that pops up, change the "Font" selection to "Always use the font I set".

5. Then click to open the font settings below, select the font format you want, and press enter to confirm.

6. That's it.