from what I remember, the tmv7a doesn't do narrow band FM.
If you are refering to something with a smaller step size,, simply change 
your step size to 12.5K from 25K in the step menu.
That is, a frequency with 7 digits instead of 6.
So if you want to listen to say 462.6125, change your step size to 12.5 and 
you can enter that frequency directly.
Frequencies like that aren't narrow band
If you are trying to listen to narrow band, the TM V7A will do it, but it 
doesn't have actual narrow band TX or rx from what I recall.

73
Colin, V A6BKX
----- Original Message ----- 
From: "Gary Tillinghast" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, November 01, 2012 2:50 PM
Subject: TM-V7A


> Hi all,
> i having to find this menu control, but haven't found in any thing I =
> have read.  What menu setting changes the frequency dispaly.  This is =
> for changing a 70 CM frequency to make it recieve a narrow band =
> frequency.  Thanks all.  Gary KB2YAA