Now discovered that pressing the yellow strip (instead of menu) and 2 will increase size x2 (pressing 4 increases by 4), you must press the yellow strip again and the left/right/up or down arrows to move the zoom around the screen.
This isn't mentioned in the manual I have and entry found by chance.
Additonally-
I purchased a Peter Gabriel DVD - Growing Up Live , and found the first screen that gives the options...
Play, Select track, Set up (and a 4th item I can't remember), usually I would use the left/right and up/down arrows to select and then press go - but the arrows didn't move between the items, yet when I played it in the Panasonic HDD/DVD it worked ok.
I showed this to my B&O dealer who then took the disc his store and the same happened there. He contacted B&O who advised you need to press the yellow strip on BEO4 and this then allows selection of Play, Select track etc.
It was the first time the dealer had come across this on a DVD - have any of you?