Organize all the galleries on separate documents and categorize them as you like... Then in the document where you want to show all galleries/pictures:
If you want to list all galleries and have a single picture from each gallery, use:
Parameter: &childgalleries_ids
Description: Parent documents to search,looking for childgalleries.
Possible values:
* Comma delimited list of document ID’s to search for childgalleries.
* "all" to list all galleries.
Default value:
Current document
Or if you want to list all pictures / certain amount of pics, use:
Parameter: &gal_query_ids
Description: ID’s of the documents from which you want to retrieve pictures.
Possible values:
* Comma delimited list of document ID’s
* "all" to get pictures from all galleries
Read MaxiGallery wiki for available parameters
http://wiki.modxcms.com/index.php/MaxiGallery
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