In this guide we will help you change GTK themes, icon themes, and window decoration themes using two methods. The first method consists of using Dconf-Tools, the second consists of using the terminal.

Dconf-Tools Installation

Open the terminal (Ctrl+Alt+T) and run this command to install Dconf-Tools:

sudo apt-get install dconf-tools

Then start it via the Unity dash:

Method 1: Changing GTK Theme and Icon Theme using Dconf-Tools

Launch Dconf-Tools and head to org > gnome > desktop > interface, and on the right pane of the window, locate the following entries:

gtk-theme         ---> Displays the current used GTK theme
icon-theme        ---> Displays the current used icon theme

Rename them to any other theme folder name as displayed in the following folders:

/usr/share/themes    ---> contains all installed GTK themes
/usr/share/icons       ---> contains all installed icon themes

Changes are instantaneous, no need to reboot.

Method 2: Changing GTK Theme, Icon Theme & Window Decoration Theme Via The Terminal

1. Changing The GTK Theme

Open the terminal and run this command to change the GTK theme:

gsettings set org.gnome.desktop.interface gtk-theme 'Theme_Name'

Replace "Theme_Name" with the name of the theme you want to use. To use, for example the Radiance theme, run this command:

gsettings set org.gnome.desktop.interface gtk-theme 'Radiance'

2. Changing The Icon Theme

To change the icon theme, use this command:

gsettings set org.gnome.desktop.interface icon-theme ''Theme_Name'

3. Changing The Window Decoration Theme

To change the window decoration theme, run this command:

gconftool-2 --set --type string /apps/metacity/general/theme 'Theme_Name'

That's it!

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