Just insert a HTML section in the form and add your title in HTML like this example:
<div style="font-size:1.5em;text-align:center;padding:5px;background-color:green;color:white;">This is a white text on green background</div>
Insert an image like this:
<img alt="My company logo" src="/Sites/YourSite/SiteAssets/YourCompanyLogo.png" style="width:100px;">
Alexander