Community
Hello, and welcome to the Discussion Groups!
While you are in the Family Editor, "Structural Settings" and/or "MEP Settings" is greyed-out, which is probably what you are seeing. The previous post is referring to "Settings" as the Panel Name on the Ribbon. If you wish to create new Subcategories, go to Object Styles. If you wish to modify/add Line Patterns, you can find that under "Additional Settings▼". See image below.