Maybe this question has been asked before, but I would appreciate if someone can tell me how to map a building with a “hole” in using ID editor.
You then have to draw a multipolygonrelation; I don’t know if that’s possible in iD.
Use JOSM instead
Draw the building with the ‘Area’ tool and tag it as you usually would.
Use the ‘Area’ tool to draw the hole.
Shift-click to select both areas at the same time.
Right-click (control-click if you’re on a Mac) and select ‘Merge’.
Job done.
Friendly suggestion: if you don’t know, maybe wait until someone who does know can answer.