The playlist items can be marked with categories of the specified color to visually differentiate types of content like commercial items, TV ratings, etc.

The category can be defined for each individual playlist item. For this click within the "Category" cell of the playlist item, and the drop-down list with default categories will be shown:

custom_category_applying

Select a category you want to apply for this item.

The applied categories in the playlist look as follows:

custom_category_playlist

To delete the applied custom category, select "No category" for this item.

The custom categories are created via the "Preferences" dialog.

Important
Refer to this paragraph to learn how to create custom categories.
Note
Markers of custom categories are also displayed on the timeline at the "Item" detail level in the Cinegy Air control application.