Usually folks want to take an HTML file and convert it to a Master Page file. However, I have a master page that I want to work in with Design Manager. To do so, I need to upload an "HTML" file and modify it with the Design Manager Editor.
I haven't found how to convert from a Master Page to an HTML file to allow me to use the Design Manager Editor.
8/22/2022 - Mon
Your help has saved me hundreds of hours of internet surfing.