Find in Files to open in new dialog

Does the "Use Buffer" toggle (rightmost button on the left) not do want you want?

"Use Buffer" does indeed do what the poster asked for (actually better).

However, I didn't realize what Use Buffer's function was until I read Jon's comment here; it wasn't clear to me what it would be using the buffer *for*.

If the tooltip read "Show results in buffer" I think this would be more obvious.

A related question. Is there a way to open the file directly from the shown results?

Yes "Show Results in Buffer" is key.  I didn't understand this button either.

Also, is it possible to make Super+Alt+B toggle it?  Reaching for the mouse and hitting such a tiny button ain't a great use of time.  :)