On Tue, 22 Sep 2020 19:42:28 +0200
Uwe Brauer <oub@...> wrote:

> >>> "UB" == Uwe Brauer <oub@...> writes:  
> 
> > I am running in a new problem. Being old fashioned I still like
> > seamonkey because it offers browswer+mail.  
> 
> > However the fonts, especially of the summary lines in mail are very
> > small. I changed all the fonts I can think of, first in seamonkey and
> > then in the trinity setting but no result the fonts size in the message
> > itself I can change but not of the summary buffer.  
> 
> > Anybody has an idea?  
> 
> I just checked in ubuntuu (gnome) I can using the gnome-tweak tool
> enhance the fonts, but trinity seems not to influence the seamonkey
> fonts (and of course I changed these also)

Seamonkey and the other Firefox-family browsers are GTK-based.
TDE is not.  You can sort of control GTK themes from the Trinity
Control Center by installing gtk3-tqt-engine and gtk-qt-engine, but
these are buggy and can cause other problems.

The other options are to find a desktop-agnostic GTK themer
(if such a program exists), or hand-editing GTK theme files.

E. Liddell