Guys, I hate to beat a dead horse, but I discovered new micro feautre I really like today. I found the little slider on bottom right of the finder windows (in icon view).

Now currently, all old windows are defaulting to a very small icon.

I would like all old windows to default to a much larger icon.

On one of the old windows I changed the thumbnail to a large window and clicked "use as default"

Of course nothing changes with other fodlers!

So I still don't get it, what the point of this "use as default?"

It does not have any bearing on the window you clicked it for. That window will stick anyway.

And it has no bearing on any old or future windows, so I still cannot get my head around what "use a defaults" accomplishes? thanks.