The main Layout / Presentation section is accessed by selecting the tab at the top of the wizard window:

The Layout / Presentation section is where you will create and/or edit the slideshow's layout and the general user interface for the slideshow.    The section appears as follows:

The subtopics in this section detail the process of user interface creation using the wizard.    Make sure to read all of the topics for a thorough understanding of building, maintaining, and customizing slideshow layouts / user interfaces.