How do I increase scale to cover entire screen in lovelace?

I just upgraded my tablet from a Fire 8" to a larger 10". The previous UI fit like a glove but this one isn’t scaling on it’s own to use the entire screen. What’s the best way to scale this to use up the free area in the red bars?

Right now these are just basic nests of vertical/horizontal buttons/picture entities…

Hi, change the view to panel mode.

I would suggest sidebar mode. It makes editing much easier.