Instead of the options No, Yes (start expanded) or Yes (start collapsed) it should also be possible to start expanded or collapsed conditionally.
Imagine you have an entity that is associated with 0 or more other entities and you would like to show it on one page containing a dataview and a datagrid of the associated entities. There is no need to show it expanded if there are no associated entities.
Seems like a duplicate of this idea: https://forum.mendix.com/link/ideas/1154
Maybe you want to upvote it too.