A 'Step-Layout' format differs from a 'Standard Layout' format in two areas:
1. the 'Info' section and...
2. ...the "Assign Database Records' section.
The following article will provide an overview of each.
Part 1 - The 'Info' Section:

Opportunity 'Info' Headings:
A. Opportunity Details Header (Admin Users can edit certain record properties directly from this header)
B. Tab Navigation (Related Assets, Additional Info, and Interactions)

'Related Assets' Sections:
A. Opportunity Details: (Non-Admin Users can edit mandatory record information from this section)
B. Related Asset display gallery: The platform will display assets that might be useful for a given opportunity. (Admins can find the controls that determine how the platform filters and suggests assets under “Setup > Asset Configuration – Opportunity tab)”.

Info tab - 'Additional Info' :
Here a user can view and update Opportunity record data. This is often were admins will place additional/optional data entry fields when creating a custom Opportunity record format.
Info - tab - 'Interactions' :

'Interactions' Sections:
A. Add/remove Contacts
B. Associated Contacts: View Contacts contacts associated with this Opportunity
C. Tab Navigation: List View/Map View/Activities View

List View
Lists all contacts currently associated with the Opportunity Record.
Map View

Activities View

Part Two- The 'Assign Database Records' Section:
In this action, Admins can associate Product Database Records with a given Opportunity by clicking on the 'Add/Remove' toggle.