Cannot hide the dock

Hello!

Before I complain about being unable to hide the dock, I want to say how much I appreciate Blank. A month ago I shifted to greyscale and it’s been a revelation - I’ve naturally decreased my phone usage to mostly productive endeavors. This morning the Blank app appeared on my radar through the Wall Street Journal article on subscriptions, and I immediately bought the lifetime. Combined with greyscale colorspace, this is perhaps the final piece of my mission to reclaim my attention - if only I could actually hide the dock. I used the grey wall paper in the app, but I don’t have blank Home Screen to import. So, the dock remains. Help would be very much appreciated. Thank you very much.