The ‘Bulk Edit’ tool makes tidying up existing data a whole lot easier for Editors.
At any crag, you can go
>Action >Update >Bulk Edit
then select the fields you want to update and a customized form will be built. So you can create a simple form to quickly fill out the data for a single item (eg Area Type), or a complex one that allows you to update everything at once- like an editable guidebook.