So, I just got a used Toshiba TV (model 20af42). I'm just trying to
figure out how to set the display settings (Color, Brightness, etc).
However, the TV itself only has five buttons on it - "power, volume
up/down and channel up/down" (I checked the back of the TV as well as
looked for any panel that I could open).

The remote doesn't appear to have any way of accessing the picture
settings. I was hoping I could do some key combo or just hold down one
key for a prolonged period of time to access the picture settings on
the TV - but no luck.

Any suggestions on how I might use this remote or the TV directly to
access the picture settings?

Thanks,
Novice