You can control the visibility of Decks and Deck Names using the Structure visibility dialog or the Deck icon on the Visibility toolbar.

You can also modify some Deck properties numerically in the Deck table of the Data window.

Decks appear in the list of parts in the Part table in the Data window.

Individual decks may be shown or hidden. This is done by right-clicking on the part in the assembly tree view, and choosing Show or Hide from the pop-up menu, or by changing the check box in the Visibility column in the Data window.