If ‘OSM’ was selected as the source type, a corresponding polygon must be opened.
Next, the ‘OSM Overpass endpoint’ must be specified:
An overview of publicly available OSM Overpass endpoints can be found here.
Under ‘OSM types’, all or individual types can be selected:
The import is started with the ‘Import’ button:
The result is displayed in an information window:
Once the import/update is complete, a query appears asking whether the import settings should be saved in a template file.