This document provides guidelines for customizing content in the OBIA catalog. It instructs users to create copies of any content they wish to customize and save it to a folder called "Custom". This ensures any customized content is not overwritten by future updates. It then provides two examples of customizing existing reports - adding a new filter and changing a graph's data grouping. The steps show how to create copies of the report, dashboard, and any related components before modifying them to achieve the customization objectives.