How come I do not have the option to select a visual force page as an option for my page layout? I want to be able to use a visual force page for the page layout because I want to list the (a custom object) products selected for the service case (which also is a custom object) layout.
In the salesforce documentation it says there should be a visual force page field in the left column: https://developer.salesforce.com/docs/atlas.en-us.workbook_vf.meta/workbook_vf/overrides_2.htm
Also here is an example where another user has the option while I do not.