Style sheets available in Koo platform let you modify the appearance of the application in order to give it a more attractive design or fit the company's image, allow increasing button and other elements size so they can be used in touch screens or they can be used to simply highlight an element.

The following images show Koo application modified using style sheets. In the first one you can see NaN's logo as application's background. The other two images show Koo in Touch screen / Point of Sale Mode, with bigger buttons and virtual on-screen keyboards.

As an example, here you can see a video in which we modify several widget's appearance.