This type of view uses the first card in the cards
array to expand it to ocuppy the complete view space, similar to panels. One very good practical use will be for floor plan type of cards.
Example
views:
- icon: mdi:settings
id: debug
title: Floorplan
panel: true
cards:
- type: picture-elements
image: /local/floorplans/main.jpg
elements:
- type: state-icon
tap_action: toggle
entity: light.ceiling_lights
style:
top: 47%
left: 42%