Re: difficulty adjusting vertical and horizontal panel sizes in gtk3 programs

[PHO <pho%cielonegro.org@localhost>]

On 3/29/25 05:57, Ramiro Aceves wrote:

> > Try creating a file ~/.config/gtk-3.0/gtk.css with:
> >
> >    separator {
> >        min-width: 6px;
> >        min-height: 6px;
> >    }
> >
> > But some applications seem to use custom widgets and ignore this. For 
> > Thunderbird you need to create a file ~/.thunderbird/{your-profile}/ 
> > chrome/userChrome.css with:
> >
> >    hr[is="pane-splitter"][resize-direction="horizontal"] {
> >        width: 6px !important;
> >        cursor: crosshair !important;
> >    }
> >    hr[is="pane-splitter"][resize-direction="vertical"] {
> >        height: 6px !important;
> >        cursor: crosshair !important;
> >    }
>
> Hello PHO,
>
> Thanks so much for the tips and suggestions. I have tried both and I 
> have not seen any change in thunderbird behaviour. I think I have done 
> it well following your advice.

Oh I forgot that Mozilla disabled userChrome.css by default. Try this:

- Open "Settings" in the "Edit" menu.
- Choose the "General" tab.
- Scroll the window to the bottom. There is a button "Config Editor". 
Click it.
- Type "legacyUser" to the search field. A configuration item 
"toolkit.legacyUserProfileCustomizations.stylesheets" will show up. It's 
set to "false" by default, so change it to "true".

Now you can customize the UI with userChrome.css.