Fetch on hub
Screen: Deploy.
What it is
The tooltip says Ask the hub to fetch its settings now — nothing is sent again.
What to enter
Press it.
What it changes
The hub fetches the settings already waiting in the cloud.
House and app: this control writes nothing to the project by itself, so nothing changes in the house or the app from it alone.
If it goes wrong
Select a home first when no home is selected.