bulk custom field updates for the list
2022-10-19_11-28-28.MP4Go to Contact Manager
Click Advanced Search button
On the left side, find contacts belonging to lists (option is called List Membership)
Select a list
Click Search button at the bottom
Select the contacts you want to update (or select all of them by clicking on the square at the header)
If you are changing multiple contacts, click on the gear icon on the top right. Note: You MUST select the top Gear icon, and not a user icon
Click on Edit Contact(s)