Question about keybind

[H4MST3R3N3RGYBALL]

How do I make the tab key instead of inserting the first item but cycle through the suggestions I couldn't figure out this how to do this from the given page.

[alexwforsythe]

# Tab and shift+tab enter the interactive completion menu.
bindkey '^I' menu-select
bindkey "$terminfo[kcbt]" menu-select
# Tab and shift+tab cycle the cursor in the completion menu.
bindkey -M menuselect '^I' menu-complete
bindkey -M menuselect "$terminfo[kcbt]" reverse-menu-complete