The foundation of all Visibility Settings is Categorization. A category can be hidden to simplify the view in your drawing area. For example, if you want to hide notes and comments, you could hide the Text category. Categories are also used to determine visibility in viewports in Paper View.

Every component in CET Designer is automatically placed on a category. This includes products as well as generic components such as text, dimensions, arrows, and more. Categories for the latter type of components can be changed to customize visibility with filtering and View Modes. 

Manufacturer's product are categorized on shared categories so that all similar components can be turned off together. For example, if you have seating from multiple manufacturers, all of them should be on one Seating category instead of separate categories for each company. 

Use the Categorization dialog to manage visibility with the categories tab, levels tab, and View Modes tab. Levels are used for drawings with multiple stories, which can be drawn from the Architectural component tab. View Modes are predefined sets of categories, so changing an object's associated categories can also affect the View Modes in which it will appear.

You can access the Categorization dialog from the Tools drop-down menu or by right-clicking on a component and selecting Categorize from the context menu.