How to create a page (or sliding page) that initially contains only an metafx-div

I’m trying to create a simple Advanced Search page that contains a metafx-div, but I don’t know what component to add to the page. After that, I need to drop in a metafx-col so I can add a bunch of textboxes. Not sure how to do that either.

A metafx-div is the container of a column to add a column you’ll need to drop a Panel Card first

I can use a panel-grid, but I don’t want the top of the panel-grid to appear where one sees the caret to colapse or open the panel. I just want to see everything below that. How do I do that?

You can use a Container to create a box without needing to use a Panel Card.

It does not look very nice, because it does not have a background.
The PackNum field and button below are inside of just a container, the rest is in a Panel Card…