Thanks @div3xi, when I do this, indeed I can create a template, but it starts blank. Sure I can add relations to it, but what I had in mind in my request was to have an option to add all relations at once or previously load all of them. It is because, at least for me, it takes much less work to delete an unneeded relation than to add it. In my use case, I need to create many different templates for a single type, then I thought it would be useful to be able to [Duplicate an object](Duplicate an object) or to load all relations at once.