I imported all my cards as Near Mint when I was just using Deckbox to manage my collection. Now that I'm trading, I need to refine their condition. I'd really like to change everything in my collection to Good/Lightly Played and change the valuable cards to NM where appropriate. Is this possible at the moment? If not, I would love it if you added this feature!

+1. I was just thinking of suggesting this myself. While we're at it, let's add bulk-editing of editions, too. Oh, you just imported four hundred commons from the same set, but left the default as "Unknown Edition"? Have fun fixing them all one-by-one, or else just scrap them all and start over from the beginning.

Hear, hear!

Yep, bulk editing is something we definitely want to have soon.

5 years later, here I am looking for the same feature.

Nothing?

7.5 years later still waiting :D

I came looking for it too. +1, I guess

12 years later, we still need it.

On the question of bulk editing, it would be nice to be able bulk edit the set edition of cards in a deck. I see this as solving a few problems: 1. Get accurate deck value, 2. Accurately reflect inventory, 3. Resolve unmatched card entries (for even more accurate inventory).

This would add two options to the "With selected" drop down:
Update Edition in Deck
Update Edition in Deck+Inventory - This would update the selected card to the edition you choose, and ignore cards with no match (like a commander precon that use the lands and occasional cards from the parent set). It would also update the number of undefined copies of the card in inventory to the selected edition).

As it stands, updating cards in a deck, and defining undefined cards in inventory to accomplish this is a tedious process.

Thanks for considering.