I am using kde+debian 13 kontact version: 6.3.3 and I am not able to find settings to change font family size in kmail composer setting, I know, I can change them for every message but I want same font for every message by default that is not NOTO.
i would try changing the fonts in kde settings > fonts.
But I don’t want to change fonts of whole system. Thunderbird has options in it’s settings> composition section.
Look in KMail Settings→Appearance.
Select the Fonts tab. n there click the “Use custom fonts”.
now notice “Apply to:” combo box where you can select Composer
Weird, one would expect composer fonts settings to be in composer section.