How reset assistant editor position?

I don't know when/why my assistant editor opened on bottom. I don't have any idea how to get it back to its original position (on right side). It's annoying.

Hold down the option key when clicking. This way you toggle between the directions there the editor is opened.

Yeah... I found it myself after 15 minutes of digging. It's right there under the "Assistant" menu item.

How reset assistant editor position?
 
 
Q