I have a Map content with attribute table and a related attribute csv table, linked with a common field.
When preparing a printing table I'd like to add both tables to my layout, filtering them with map content. For shapefile attribute table, it is pretty easy (checking"Show only visible feature" command). I cannot filter related table, because if I check "Show only visible feature", I obtain an empty table. Using "Relation children" option, I cannot see any relation, both with table used as children than as parent.