Here's some 25-year-old Finder arcana for you:

If you hold the command key, you can drag and drop files, apps, applets etc into Finder's toolbar for one click access

@stroughtonsmith -- Oh my. That translucent (liquid glass) toolbar in Finder is tragically ruined. It's a window with a toolbar. Why does it have to look like anything else? It makes no sense for the content to scroll to the edge beneath floating blobs.