HTC have included theming with their new One M9 device which allows you to completely overhaul the entire look and feel of your device in one hit, and you can see them all below.
Theming changes every element of the user interface of your device from the way the icon looks to the wallpaper, right down to the font used. HTC have bundled a variety of themes giving different that can give different looks to your HTC One M9 right from within the built-in settings.
Which one is your favourite? Let us know in the comments below.