I don’t know about you but I have the hardest time remembering where the letters are in comparison to each other in the dressage arena. The USDF has a layout of both sized arenas for a pictorial reference.
But there is a fun little rhyme to help you remember the wall letters as well For each arena.
For the short arena, starting at “A” going clockwise:
All King Edward’s Horses Can Make Big Fences
For the standard (large) arena, starting at “A” going clockwise:
All King Victor’s Expensive Show Horses Can Manage Really Big Plastic Fences
Then the invisible letters in the center of the arena starting from “A”
Doing Lots Xtra Is Good