Rotary encoder and display menus

Could someone direct me to a guide in regards to making menu selections and adjusting values of variables from the menu.

as with most questions answers can be found under the tab called learning on this arduino home page and look for ' switch statement' this allows you to create multiple choice or menu questions...if you choose 1 do this..choose 2 do another etc such as make a variable x = 5 if you choose 1 or make it 10 if you pick 2.... switch and case is what you are looking for can also be found in a C++ programming book