One of the easiest ways in Fusionmint to bulk edit field value for multiple items in one shot is the "Multiple Edit" feature available in items table. Here is how you can use it.
Performing Bulk Editing on Items:
Select the list of items that you want to update.You can either select the items based on your criteria, or use the table column filter to narrow down the list of items you want to update.
Once target items have been selected, use the "Multiple Edit" action in item table menu to launch the editor
This opens a small editor in popup window, here you can select the target field and underneath it, you can set the new value. To clear any existing value, all you need is leave the value field empty and that field will be cleared of existing value on clicking of "Edit" button.
Once you have set the desired value. click on Edit button to perform bulk update on target fields.
Supported Fields For Bulk Editing:
Currently following fields are supported for bulk editing: