1-to-1 Contact Link
1-to-1 Contact Link is designed to create links between 2 contacts so that you may quickly go from one contact to the another. It could a bidirectional link (for instance, to link spouses) or a unidirectional link (for instance, to link a contact to his/her lawyer, accountant, boss, etc.). Going to the linked contact is a matter of clicking a button of the layout.
Here is an example of how a link may look like. Clicking the Go button will take you to Chris Huffman's record.