How to add additional gmail accounts

That is a great question as I have JUST PURCHASED the new WATERPROOF Kyocera HYDRO for BOOST MOBILE running Ice Cream Sandwich ANDROID 4.0

There is an app ICON for GMAIL, but I do not see a screen that allows you to add MORE GMAIL ACCOUNTS

ANYONE please advise how to proceed, as it only lists the first account that I put into it...no menu options I can find to add another GMAIL ACCOUNT on THIS DEVICE
 
go to gmail,go to inbox,click on left button on the bottom of screen(four buttons),click on settings,then in upper right corner of screen will be add account option