From a building page, click the pencil icon to open the building details drawer.
Click the ‘Add a Field’ button, then select ‘Add Fields From Another Building’ from the menu that pops up.
Select building fields from an existing survey
This opens a menu displaying all of the buildings in the survey, along with the building photo, address, and custom fields for the building.
Clicking a row in the menu will select that building to copy space fields from.
An alert will show asking you to confirm your selection. Click 'Add' to confirm.
The table will be updated to show the new data fields.