Membership Upgrades

Hello,

We're trying to figure out how to allow members that sign up for our free subscription to upgrade to paid or higher plans.

The options page says
"If you would like your users to be able to see their subscription details and upgrade / renew them then also add the shortcode [renewform] on this or a linked page."
as well as
"You should limit the amount of time allowed between membership upgrades"

I've included a screenshot of what the account page looks like, nowhere do I see where they can actually upgrade, are my options wrong?

Thanks