Signed-in users can also find this guide, with screenshots, under Help in the app.
If you have access to more than one building, a property selector appears in the top bar. If you belong to more than one organization, an organization list appears at the top of the menu on the left. With one building and one organization, neither is shown.
To focus on one building, open the selector with the building icon in the top bar, next to the bell, and pick the building.
To see every building again, pick All properties. On the Dashboard you can also select the small x next to the building name after Showing.
Pages that always work on one building, such as Parking, Residents & units, Vehicles and Contractors, use the building you picked. If All properties is selected, they show your first building and a Property list at the top of the page so you can change it.
To switch organizations, open the list under the logo at the top of the menu on the left and pick the organization. ParkCommand reloads and opens that organization's Dashboard.