InfoPath Dev

I am trying to create a simple sign in/sign out list (SharePoint Online) and InfoPath form. I am unable to get the form to show in full screen. It seems the team site I created is inheriting the template that shows the left navigation pane and I am unable to disable it. How can I show the form in full screen view ?

I have an Infopath 2013 form that has a people picker field that has SharePoint list setting = show field - work email. I need to capture the user name to another field when users select from people picker. The people picker field actually shows user name but saves the field to the SharePoint list as email address, which I also need.