Cars gallery demo:
In gallery size settings you can define columns amount for the gallery layout. At the same time every image in media manager have also column field. So combining this 2 fields you can build custom layout. For example in gallery size settings you have 3 columns defined. Then images from first line could have 1 column value. Second line (big) image could have 2 or 3 columns value … depend of your needs.
According to automatically date filtering, not sure if it’s gonna work this way. For now our gallery don’t have such additional parameters. in general you can create gallery in posts which could be scheduled for posting in different day, using post additional settings.
Drop down menu mode available only in mobile gallery mode. I’ll forward your request to developers and we’ll try to implement such menu mode in future gallery releases.