Three quick goes. No ruler, no undo, no excuses.
One finger, one stroke, around the dot. Any size.
It disappears in a moment.
Drag the corner, or pinch, until it looks the right size next to the dog.
Enter the admin password.
Hold a bank card against the box and adjust until the edges match. Do this once on the stand tablet.
The QR code points here, with the player's nickname, score and id added.