# What are Stylesheets

Stylesheets can be applied in three ways

- Attached to solution
- Attached to solution interface
- Default application stylesheet

Stylesheets are defined in: Designer > Ressources > Stylesheet

Stylesheets contain CCS code to markup the page elements. The stylesheets may inherit content from each other, which is spcecified by the *Parent stylesheet*. Parent stylesheets are automatically preprended to the stylesheet in question, so definitions may be overloaded if needed.

A good ressources for learning CSS can be found here: [http://www.w3schools.com/css/](http://www.w3schools.com/css/)

The default stylesheet for the application is defined in the policy: **defaultStylesheetID**