Is there a way to add free text to a release in my Collection?

What the title says.
I have a collection, with my own catalog number for each release.
In Discogs there’s a way to add that number for each release,but I can’t find it in MB, can anyone help me?



Now that I have already added more than 1000 releases to my collection, it’s too late for me.
But I would have surely used such a feature of it had been available:

This or a collection add timestamp would have been great too (I can’t find the ticket back)!


Bump bump (not sure if allowed)

I would really appreciate this, certainly for possible public collection ideas I have. I want to make a collection for music used in British commercials/advertising, but the list is kind of pointless if I can’t put in which advert the song appeared in.