i want multiple back buttons for the view i have click through , i saw this tutorial before, but now i can't find it anymore, can someone help me please

for example i have view1 with button, after i click it the navigation controller will push to view2 , then on the navigation bar we have view1 (back) button which can go back to view1, inside view2 i had did the same like view1 but this time is go to view3, and on the navigation bar instead have one view2 (back) button, i want to have view1 and view2 both button so i can choose which view i want to go back to

on view3 navigation bar left button will look this

< view1 < view2