I've just added the cards I'm willing to trade into my collection. I now realize I need these cards to be added to offers but I don't want to go through and do them all again manually. How do I add them to offers from the collections page?

Hello,

How do I add them to offers from the collections page?

Yes you can transfert your cards from your collection to your shop, you just need to go to your options :

https://en.pokechange.net/dashboard/collection/options

Nevermind I found the button