I think the title says it all, this is a layout question. I'd like to have the same default font and grid settings in the subpatchers than in the main patcher. I cannot find how to set this in preferences.
I don't think you can set it in Prefs, I'm assuming "new patcher" means any patcher including subpatchers.
What you could do is make a template subpatcher with all the settings just right, and maybe some common elements like inlets and outlets, and save it in your Clippings folder, that might save some time. Sort of like using Prototypes, but I don't think you can save a prototype of a specific object like a subpatch (not at Max so can't test) ... can you?
EDIT -- I misread, you want to have the SAME settings in the subpatcher? I think I got it backwards. Will take a look later when I'm at the Max machine.