Where is the menu button on Kindle Fire?

there is no menu button but there is a little button that shows up everywhere and its like a little house to show that when you to touch you will go the homecover. Once i get "home" what does the settings "button"look like my kindle will not go from presentation to portrait viewingi thinks its a seeting someone playing with my kindle changed but i dont know which is settings once i get home so i cant fix t