Hi, how can you resize the windows so that they display the tex code on the left and (DVIEW or PDF) output on the right, and both in bakomatex window?

Press mouse (without releasing) window over subwindow title (where you see signs "Source FIles", "Working Files", etc.) and drag them. So, you can dock subwindows as you want and even undock tem, after which they may be freely moved and resized.

There is demonstration of moving windows and toolbars.

I used to be able to do this, but now the windows are locked in place vertically (one on top of another) and I cannot drag and drop to dock as described here. Is there some setting to get things back into 'dockable' mode? Thanks

... Is there some setting to get things back into 'dockable' mode?
See menu option "Window / Reset WIndow Configuration".

OK, ignore last question.. After a few more tries I get it. One has to drag the window around the screen until an 'arrow cross' appears. Keep dragging the window around until that happens even if at first seemingly nothing is happening. Then things become dockable. You can also drag the window to be free-floating on another screen if you have extended desktop working. Very useful.