I can not customize 【Aadaptive.sublime-theme】because I do not know the name of this window.
Are you generally happy with the font scaling everywhere? If not, maybe you should just update this in your Sublime settings:
// Magnifies the entire user interface. Sublime Text must be restarted for // this to take effect. 1.0 is normal scale, 0.0 allows for auto-detection // based on text scale with older Linux configurations that don't fully // support GTK display scaling. "ui_scale": 0.0,
If not, there may be some themers in the forums that can give you specifics for theme overrides.