** GTK tool bars can have just text, just images or images and text.
Customize `tool-bar-style' to choose style. On a Gnome desktop, the
default is taken from the desktop settings.
BTW, I couldn't figure out how to customize it in Gnome. I do remember
seeing such an option somewhere (maybe in gnome-appearance-properties)
at some point in the past, but I can't seem to find it any more.
There used to be an Interface tab in Appearance but it has been removed by
the Gnome people. I guess that is logical, as they seem to move
towards a customization-free desktop. They decided that both-horiz (icon
followed by text) is what everybody should have.
Now you have to edit gconf directly either with gconf-editor or with
% gconftool-2 --set --type string /desktop/gnome/interface/toolbar_style both
Other values are both-horiz, text or icons.
I think we should mention it in our documentation. And I also think
there's something more going on: when I try gedit with various settings
of /desktop/gnome/interface/toolbar_style, it's clear that in both-horiz
setting, only some of the buttons get their text, whereas with Emacs
they all do.
That means that both-horiz is quite bearable with gedit but not
with Emacs. And since both-horiz is the default, I think we need to
figure out how to do the same as gedit does (i.e. specify which toolbar
buttons need to have the text displayed in both-horiz and which don't).