The remote control has a button marked "Display" and within that there is a subsection marked "Picture". There are numbers I can alter there (either up or down) but this does not appear to alter the dimensions of the picture on the screen.
Is it possible to speak to you on the phone while I have the tv on and dvd in place?
My original enquiry gave the details of the recorder Panasonic DMR EX77EB. The television is a Panasonic Viera Model No.TX-37LZD70.
The recorder remote: N2QAYB000127, Television remote N2QAYB000238.
Thank you for your patience. Problem solved! Like so many of my troubles with technology, the answer is so simple once it is pointed out. I was fixated on finding the answer on the DVD recorder remote.