You can update multiple Cards at the same time from the Project Library, via our bulk actions menu.

The menu includes:

To perform a bulk action, go to the Project Library, and select "Cards" and filter your search by card category, fields, or type a keyword.

When you have all the cards you wish to add, select onethen hit the double ticks that appear in the bulk actions toolbar to select all.

Then you can perform a bulk action from the options. Here is an example of bulk-adding Cards to a List.