Hello Jules53757,

Sorry if i do not understand well. What you want to do is save a pose for the toes locked in a special pose? If it's the case, then, you just have to create a partial pose. Pose the toes as desired, file/saves as/ pose preset, uncheck all (little icon on the right) and select only the body parts you want in your pose (the toes in your case)) You can now apply your toe pose to every pose you create. If you are creating a pose with the active pose tool, then, open your tool setting tab, select "active pose tool", pose you feet and toes as desired and "toggle pin" for toes and maybe feet if you are moving a lot your character.

Hope it helps, Best regards,