The Teamworkx Issue Picker includes a custom field for easy linking of an issue to other issues. The link type is defined beforehand when configuring the custom fields. In addition, the values of individual custom fields can be copied from one process to another and numerical values can be added together.
The Teamworkx Issue Picker Custom Field can be displayed on any transition dialog or on a customer portal page of the Jira Service Desk. These are single or multi-select menus that offer previously defined processes for selection via a JQL query.