How do I change the default save for text files from ansi to utf-8?

I’ve looked and looked for a place and can’t find it. I can find stuff to change display of files and folders only. Bonus Q: how do I lock in “details” as display type. I have repeatedly elected “show classic folders” and “details” and selected the details I want and applied to “all files and folders”—and I keep getting a hodge-podge with tiles, icons, and lists, all of which I have no use for. I only use details or thumbnails, and always details first. can I inactivate tiles, icons, and lists? And of course my orig Q, can I default to utf-8 for txt?