Pages and topics can be hidden from inventory and unhidden at a later point if you wish. This is done through archiving.
Two Ways to Archive a Page or Topic
This opens up a contextual menu from which you can choose Archive and then select either Topic, Page, or Row (both).
Show Archive Items
Pressing Show Archived Items in the Inventory action menu reveals all the archived items in the list. At this point the button toggles to Hide Archived Items.
Pressing Hide Archived Items 
in the Inventory action menu hides all the archived items in the list.