I would like to know how to delete or rename the collections
At this time we do support removing a collection. Will be done soon.
It is lower priority for us because there is no harm in having the obsolete collections there, except that you see them.
OK, THANK YOU
What about hiding those collections?
It is not possible at this moment.
Feel free to submit a feature request in our Feature Request forum.
I have delete each row and then you can rename the columns
Haven't found a way to rename the collection yet. But a reused collection seems to work
You can finally remove unneeded database collections from your site! No more "NewCollectionName", "Test" or other typos polluting your database folder.
Be aware that removing your collection might have some consequences for your site, so it's better to remove Dynamic Pages, Datasets, and Reference type fields that are pointing to collection about to be deleted.
More details here: https://support.wix.com/en/article/removing-a-collection-from-your-database. Happy cleaning!