If you use Peggy template with Mede8er model (from Models list), then in the Templates window you can't see it, because Mede8er model has background size of 1920X1080 , and Peggy template is for models with background size of 1280x720. You either can change Models.html file (in Tvixie root directory) for Mede8er player or use WD HD TV as a default model....
I hope this will help you, cheers...