Enable the option and use the editor to write custom css code that should be delivered with the standard instance css. This is the easiest way, for example to change colors, like in this example:

:root {
  --color-highlight-h: 206;
  --color-highlight-s: 100%;
  --color-highlight-l: 18%;
 
  --color-primary-back-h: 60;
  --color-primary-back-s: 11%;
  --color-primary-back-l: 96%;
 
  --color-secondary-back-h: var(--color-primary-back-h);
  --color-secondary-back-s: var(--color-primary-back-s);
  --color-secondary-back-l: 90%;
}

AWP supports customizations which apply changes to the web-application. Customizations can be added manually by putting them into the Tomcat/webapps/awp/customizations folder or by uploading a bundled customization into the list here.

This lists shows the customizations currently available. If a new customization is found in Tomcat/webapps/awp/customizations, it will be added to the list automatically but disabled.

Click Add to upload a new customization and Remove to delete the entire entry. To edit advanced options, click the Properties button.

Here you can enable or disable the customization and change the configuration of the configured customization.

Saving changes will notify the running AWP instances to apply the enabled customizations to the live system. A Tomcat restart is not required.