Understanding z-index

Understanding z-index in CSS Reset

Enter z-index in the input fields below:

Element 1

Element 2

Element 3

Element 4

Element 5

Element 6

Element 1 z-index: auto

Element 2 z-index: auto

Element 3 z-index: auto

Element 4 z-index: auto

Element 5 z-index: auto

Element 6 z-index: auto