In this lesson we customize page layouts using the Enhanced Page Layout Editor.
From Setup, under Settings, select Security > Session Settings > Caching. deselect 'Enable secure and persistent browser caching to improve performance'
To track the history of changes to fields on records, you need to enable field history tracking on the object. You then specify which fields you'd like to track history on.
In this lesson, we create a couple of picklist fields. We will use these fields later to establish field dependencies.