Introduced with WoltLab Suite 3.0 there's a featured called style protection. I'll explain what it is and if you should keep it or disable it.
Styles
With WoltLab Suite 5.2 some styles by Elevenfour have style settings that help you to customize the style. This article describes where these are located and what they do.
This support article describes how to solve a possible problem after choosing a style if the style was imported without installing the dependencies.
Do you want to add or change images of a WoltLab Suite style but aren't sure, where the images folder is located? This article shows where ist is.