Information is presented in menus, very similar to ELM. Here is a table showing the common keys used to navigate menus in Mutt.
j or Down next-entry move to the next entry
k or Up previous-entry move to the previous entry
z or PageDn page-down go to the next page
Z or PageUp page-up go to the previous page
= or Home first-entry jump to the first entry
* or End last-entry jump to the last entry
q quit exit the current menu
? help list all keybindings for the current menu