The selector doesn't appear

if you have no active building, the header shows a "Create a building" button instead; start by creating one.

click anywhere outside the menu to close it without switching buildings.

the selector is present in the header of every page once you're signed in.

Switch the active building

Switch from one building to another from the "My buildings" selector in the header.

Switch from one building to another when you manage several buildings with the same account.

All members with access to at least two buildings.

In the header, click the button showing the active building's name (building icon + name + chevron). The drop-down menu opens.
At the top of the menu, the "My buildings" label is followed by the list of your buildings (each one's name + address); the active building is highlighted.
Click another building. The menu closes and the application switches to that building, keeping the current tab and reloading its data.
At the bottom of the menu, separated by a divider, the "Create a building" entry opens the creation wizard.

Open "My buildings" menu: list of buildings and "Create a building" entry.

Instant switch

Switching buildings is instant: no page reloads, only the chosen building's data is refreshed.

The selector doesn't appear: if you have no active building, the header shows a "Create a building" button instead; start by creating one.
Close the menu: click anywhere outside the menu to close it without switching buildings.
Available everywhere: the selector is present in the header of every page once you're signed in.