In Numbers, is there a way to delete/modify old custom data formats for cells?

Funny enough, it seems to work on a new document and also copying the whole table (the whole table was fine, didn't have to copy the content onto another table) worked ok by also retaining the new custom format.

I then thought it could be because the document is shared with a friend so I shared the new document (to myself): it states as "shared" but no signs of issues with the custom data format.

hurrah. Well, yes, but this had happened before and I wish I knew why and how it happens... On a good side note, I can still copy the table and start afresh...

Thanks, Ian.

Luca

******** EDIT ******

No. I have now shared it with my friend (hence: a different Apple ID) and I've got into the same issue, again.

******* SECOND EDIT ****

Yep. It's consistent. I've ended the collaboration and I got the function back. Activated the sharing again and lost it. Well... now we know. Question would then be: is it intended to be so?

Hi Ian.

Yes, that is how I originally created the custom format, but now this is what I have when on a empty cell:

and when on a cell with a Custom Format applied:

Anything you suggest checking around?

Thanks

Luca

Thanks Ian

Like I wrote: v. 5.0 (5576)

Unfortunately, it doesn't show the button as available anymore and I can't find out why.

I can neither edit nor delete (nor create a new one)

Thanks

Luca