Where did my Finder Filter go? Normally I'm able to filter my search by file size as shown in this tutorial. However, for some reason this morning I can't find the filter anymore, where did it go?




This is what I'm expecting to see:


Thanks :)

Edit:
See the end of Tetsujin answer. Essentially the Filter won't show up when searching from "All My Files", which is at minimum, not a sensible design decision because launching Finder takes one to "All My Files" by default 

So if that bothers you, it's possible to change this senseless default

Just go into preferences and change to a different "New Finder window" and then cmd+F will behave as expected
That's not a search window, that's just a regular Finder window.

Hit  Cmd ⌘   F  (which will open a new Search window), or start typing something in the Search box, top right, &amp; your filters will appear.

If you still don't see it, click the + top right - highlighted in green below...



You can also use it to add more filter criteria...
(Note that "no query should be required" only applies if you start from  Cmd ⌘   F  not from a regular Finder window, as your first example.



Late discovery
It doesn't work if you start from "All My Files"
I have no idea why.