In the Diagram fact sheet, you can determine that models are displayed according to the criteria you have selected. If you want to see the model without restrictions, you can reset all criteria.
Procedure
At the bottom, click the red colored Change view icon if the view options are collapsed.
Click Reset to default to the right of the title Views.
To close the Change view bar, click in the modeling area.
The model is displayed in the default view. It is displayed without restrictions and
the Change view icon is not colored anymore.