Showing the full scope
The app will hide all the cards which are planned in the both Program Increment and one iterations of which the Program consists of.
When the "Show full scope" is enabled, a backlog of the parent Time-boxes and all backlogs of its child Time-boxes (e.g. Iterations) will be also shown on the Board.
Once all the cards are planned at the Iteration level enabling the 'Show full scope' will load all the items:
Go back to the Board - Interface - View