4. Once you've made your selections, click Save. Note that if you already do have tabs showing in Gmail, you can simply click the little plus sign on the right-most tab to access this same settings box. For the moment, Gmail offers no way to customize the tabs or add new ones.What's more, if you enable any tabs at all (which is now Gmail's default view), you'll lose the old Priority Inbox.or the moment, Gmail offers no way to customize the tabs or add new ones. What's more, if you enable any tabs at all (which is now Gmail's default view), you'll lose the old Priority Inbox.