I have a very basic question. How to I set the focussing box so that it stays in the MIDDLE of the frame on my XT30? It has a habit of randomly moving around the frame; I want it glued to the centre. I'm using autofocus on stationary objects, absolutely nothing fancy. I bought this camera because I hoped, with it's retro styling, I might actually have (retro) control over it, but it seems to have a mind of its own. Can anyone help me please with this really basic question? (And when is someone going to make a digital camera with ONLY knobs/click stops etc and NO menus?)