How to add a stamp to an existing collection at crypto.post.at

[kostasgk]

I have bought 20 stamps from https://crypto.post.at/onchain. I created a collection which is empty. I want to add my stamps but i cannot find a way.
Could anybody help me?

[owlcatz]

I have bought 20 stamps from https://crypto.post.at/onchain. I created a collection which is empty. I want to add my stamps but i cannot find a way.
Could anybody help me?

first, are your stamps on ETH or xDAI?