I used one of my dailies for this. I think you’re supposed to go out and shoot a landscape but really it’s about making sure the lines in your shot are level. I hate crooked horizons so I’m OK with it. We’re still in lockdown so no unnecessary journies, and I can’t be arsed to go out today anyway, too much else to do. My shed shelves are level, I know cos Phil used a spirit level when he put them up.