Catalog administrators and stewards can now more easily operate on Column resources in bulk with the spreadsheet export/import flow. Previously, Columns could only be selected for bulk operations at the Collection level. Now, users can export all Columns of a parent Table, edit attributes in the spreadsheet, and upload changes.
The new functionality is accessible for users with correct access via the 'Columns' tab on a parent Table's resource page (example shown below).
For more information, please refer to the documentation.