How can I use Map Dependency Fields?

How can I use Map Dependency Fields?

Map Dependency Fields allows you to create dependencies between two pick list fields.

For example, let us say you have a field called "Issue Type" and the options for this field is "Software, Computer, Printer, etc". Let us say you have another field called "Product Name" and the options can be MS Office, Dell, HP, ServiceDesk, etc.

Now, you can create dependencies between these two fields. When you select "Computer" in the Issue Type field, only Dell, HP, Compaq will show up in the Product name list. Rest of the options will be hidden.

For more help, refer Field List