How can I make folders with subfolders and no other files other than those in the subfolders display using the default format and not based on Content Type?
For example, in Folder 1 there are two folders and no files. One of the folders has image files. So Folder 1 displays based on the settings for image content type (i.e. thumbnails). I need it to not do that. It should display in Details.
I you don't want Content Type formats anywhere, turn them off under Preferences / Folders / Folder Formats.
If you only want to stop them applying to specific folders, save a path format for them via Folder > Folder Format. Load or create the settings you want, then click Save and save it for that path. (Or use the command Abr suggests, if you want to make a button/hotkey for doing it quicker, saving the current settings without opening the Folder Format dialog. Alternatively, you can also make Path formats in Preferences, which lets you copy & paste them. Wildcard formats are also an option, for matching multiple paths.)