This document provides instructions for creating custom property groups and dropdown menu properties in Hubspot. It is a 10 step process: 1) select company properties, 2) create a property group, 3) name the property group, 4) create a property, 5) name and describe the property, 6) select the property group, 7) add options to the dropdown menu, 8) repeat to add more categories, 9) make the new fields visible in the default view, and 10) check that the new fields appear correctly. The example adds fields for name, website, email, contact last name, city, agent, association, and agency management system.