Hi John and thanks. Download useful some looking stuff. Would prob need SM to try driver update, have several Viewsonic but not that model.
Thanks Dave - you're quite right, set is quite old and DVB section is not integrated so will search user manual for ideas.
Many thanks - Chris.
PS -Its a bit curious as some channels (recent no Analogue rescan - Tacolneston 23rd November 2011) give normal geometry possibilties - others don't.
No help at all in the user guide book - DVB box, I guess - Thanks folks.