Normally when surfing on sites we have on the site a thing in which we can move the site up or down (see image bellow with a red arrow). I would like to know what this thing is called, and what's the accurate verb for this action?
(does move up or move down work here? In my native language we use a word that's translated into "roll up /down" but Oxford dictionary doesn't know such meaning to my context.)
I really don't know what it is called in my native language (normally people say "roll up the page or the site"), so I don't have a lead where to start from.