Christopher Svanefalk <christopher.svanefalk <at> gmail.com> writes:
... ...I guess I never learn to research before writing. It appears that some (if not all) programs with internal settings for appearance resort primarily to their own default settings rather than global settings (this seems to be the case with Thunderbird at least). Don't know if this can be overidden somehow.
You can specify attributes of an app and its elements individually.
I would suggest you get familiar with:
http://en.wikipedia.org/wiki/X_resources
~/.Xresources (older file used to be .Xdefaults)
http://xwinman.org/rc/Xresources
http://www.acm.uiuc.edu/workshops/cool_unix/xresources.html
JB