Merge multiple vendors to one (e.g. division of one brand)
Create collection metafield definition - convermax.merge_vendors
with “True or false” type:
Go to Settings → Custom data → Collections
Click “Add definition”, fill in as shown below, and press Save.
Create metafield on collection
Create or open a smart collection defined only by the rules “Product vendor equals to …”. Option “Products must match” must be set to “any condition”.
Proceed to the “Metafields” section and click on “View all”, find “Merge vendors” metafield, and set it to True.