I've been using Sonar for years. I don't know why I started stretching the Open dialog box the other day, but it snapped into a max window view.

Now when I click Open for a file, the file selector dialog box is full screen, which is a lot of white.
There's a little stretch handle in the bottom right corner. When I click or drag on it the stretch handle disappears.  

It's a global issue. This happens on any file I work with or create from new.

Any suggestions how to get this unstuck?

I suspect this is an unknown corner that only I have gotten stuck in, but I sure would appreciate some suggestions on it.

I should note that this full open screen happens when I click open from any application, not just Sonar. Anyone have an idea how to get it to minimize?

You should get a menu of resizing options when you click on the icon in the upper left of the dialog, or right-click along the top of the dialog.

Double-click the title bar (of the Open dialog) and it should restore to its previous size.

Thanks scook and groovey1!   I thought I had tried everything and was still stuck.  Until I tried what scook suggested, which was to right click on the top of the Open dialog box window.  That brought up some choices and picking Restore brought it back to the friendly regular size Open dialog box window size.
 
So, if anyone ever stupidly (like me) stretches their Open dialog box too far and it snaps in place as a full window and you can't get out of it, that's a way out.
 
Solved!  And, I might add, thanks again to the forum members for help when one is in a jam!