Expression: "Please see below"

Hi

Do you find the following sentences correct and natural?

Tom

Hi Tom,

‘Below’ is fine but the opposite would be ‘above’

Alan

Thanks, Alan

So am I to understand that “see up” is odd or wrong? But why do we say “Look up”?

Tom

Hi Tom,

I assumed that your ‘see below’ referred to looking at what is written on a page - see above (at the top of the page) see below (at the bottom of the page. Maybe you were thinking of something else. ‘Look up’ is something different again. It can mean ‘Lift your head (and eyes) up’ and it can also mean to find for example a word in a dictionary.

I suppose context is all.

Alan