Considering a regular laptop:
a friend of mine said "under the keyboard" to mean the places where you usually rest your palms which is more towards you with respect to the keyboard.
I understood it to mean, the surface which stands between the motherboard and the key (which is not directly visible normally).
Wouldn't it be more appropriate to say "below the keyboard" in that case? Doesn't "under" imply that it's theits surface that is hidden?