Office 2019 Ribbon too chunky with DPI scaling

Question

I've just bought a Dell XPS 15 and a pair of 4k monitors. I have all 3 screens set to 200% scaling, and when I run an Office app, the buttons on the ribbon have WAY too much margin/padding and cause the ribbon to show a truncated view, despite the fact that I have more than enough room to show the whole thing:

I can't seem to find a setting anywhere to stop Office from doing this, and even if I set the scaling of all screens to 100%, the ribbon still looks chunkier than it does on my old laptop - could it be an Office 2019 thing?

For reference, this is what it looks like in Office 2016 on my old laptop (also at 200%) - much more compact and the whole ribbon shows:

Answer 1

Turns out it's in Touch Mode and switching to Mouse Mode fixes it. In order to change the Touch/Mouse Mode you must add the button to the toolbar.

Once the button has been added you can easily switch between each mode.

Source: Office 2019 Ribbon icons suddenly appear widely spaced out (all apps except Outlook)