Can a slide be a Layer?

[schmoelder]

Hi guys,

thanks for the nice tool! I'm pretty new to it so I maybe I don't fully understand how everything is supposed to work, but I have the following situation: Sometimes would like to keep a cell at the top of a slide, which e.g. contains a header and some introductory text. And then, I would like to add subslides and/or fragments with varying content below.
However, if set a type to slide and the layer to stack, the cell content gets added to the previous slide.

{
    "slideshow": {
        "slide_type": "slide"
    },
    "editable": true,
    "tags": [],
    "jupyterlab-slideshow": {
        "layer": "stack"
    }
}

So essentially, I would like to set the general style of the slide first before working with subslides or fragments.
Some guidance would be highly appreciated!