Currently Being ModeratedAug 3, 2013 5:05 AM (in response to ApplePeter)
Near the top of the Veiwer window, use the drop down menu to set the window for 'Image' - NOT 'Image + Wireframe.'
Currently Being ModeratedAug 3, 2013 2:01 PM (in response to David Harbsmeier)
Thanks David, I appreciate it.
I also realised I had inadvertently changed the 'center' and 'scale' figures! So by resetting to zero the picture locked back in place.