CB Gallery "Albums Box Width" Parameter missing for CB Content Module

I use the following CB Substitution in an inline CB Content Module:
[cbgallery:gallery asset="profile.255.field.966" folders_search="false" folders_create="false" folders_paging_limit="1" items_create="false" /]

The goal here is simply to let members download data in a Joomla Module position from a member having subscribed to this distinct advertising position.
The source for this is a "Downloads Tab" (a CB Gallery Field) in the Profile of the sourcing member.

So far I can't find way to resize "Albums Box Width" parameter which is actually avail. in CB Gallery Field config.
I'ld like to have at least 2 Albums side-by-side in the download CB Content Module - but this requires a much smaller Album Box Width as that one defined in the user's sourcing CB Gallery Field.

What I'm doing wrong in selecting the correct parameters?

Txs.

That parameter does not exist anymore. The boxes are entirely controlled by Bootstrap 4 responsive grid classes. To change them you'd need to modify the folder_container.php file and adjust the classes or to use your own CSS on galleryFolderContainer class to change the width.