(RH 2019, new UI) Master page doesn't seem to do anything
Hi, Everyone.
In RH 2019, new UI, I may be misunderstanding what a Master Page is for. But I've created one, hoping to apply it to all topics and have each topic take on the layout specified in the Master Page. But when I apply the Master Page to a topic, nothing happens.
Here's my Master Page (screenshot). Its main feature is a two-column layout in the body and the header:

But, I apply it to an existing topic, and the topic does not change, at all (screenshot):

Am I doing something wrong?
Thank you!
