I'm trying develop a system that will detect which custom fields are no longer used such that they can be removed. To be more specific: 1.) How can I determine if a custom field is used on a layout? 2.) How can I find if a custom field is visible? 3.) Are there are any other means I should check, and if so how?
Note: Im new to SF dev, but not new to coding. Im thinking of using apex via eclipse after importing the relevant information.