GNOME – How to Slim Down Ubuntu GNOME Title Bar Fatness


Previously the title bars for windows were much thinner than they are now on Ubuntu GNOME 16.04.1 with GNOME 3.20. Why is this and how can I change this? I liked the slim look I got with the numix-gtk-theme, but for some reason I don't get that slim look any more. Not with any theme.

This is how fat it is:

Title bar fatness

Best Answer

You're seeing this fatter title bar because you're using Gnome-Shell. In Gnome-Shell, the title bars of Numix theme are much fatter than the versions for Unity.

Check these two images

  1. Unity

    numix in unity

  2. Gnome Shell

    numix in gnome-shell

To reduce the titlebar's fatness

To reduce this fatness, follow these steps

  1. Create a file in ~/.config/gtk-3.0/gtk.css with these contents
.header-bar.default-decoration {
    padding-top: 4px;
    padding-bottom: 4px;

.header-bar.default-decoration .button.titlebutton {
    padding-top: 4px;
    padding-bottom: 4px;

/* No line below the title bar */
.ssd .titlebar {
    border-width: 2px;
    box-shadow: none;
  1. Log out and Login again.

    A screenshot from gnome-shell session after change

    zenity dialog after changing

However, It's reported that this tweak doesn't work for GNOME 3.20 sometimes. To tackle that, you may need the solution from this question