I'm sure this is going to be a simple answer that I have just not been able to find for myself but I'm tearing my hair (what little there is left) out over this.
How do I create custom document types and page presets that I can pick from the new document dialogue in Designer?
I have never picked one of the builtin types, they are just not sizes I ever need to use but there are a couple of dozen other sizes I use a lot that I am forever having to look up the settings for as I switch between them. Blog featured image, facebook cover picture, icon, forum avatar, that sort of thing.
I'd like to save them in their own document type, with their own page presets, I just can't find where I can add them.