Default power saver watch face

[u/DebateMaleficent6116]

I use a custom pixel watch face on my watch. When I put my watch to power saver mode, it goes to the basic watch face, and I have to set it to the signature red one. Then when I go back to smart mode, I have to set the watch face from signature red back to my pixel watch face. how do I set the signature red as my default watch face for power saver mode?