The workflow designer in JIRA is a graphical tool that enables you to see the layout of your workflow and to create and modify a workflow’s procedures and transitions.
You can manage status and transitions: add, click and drag, or select to edit properties to rename, or delete
You can add a global transition that permits different status in the workflow to transition to the selected status. Select Allow all statuses to transition to this one in the properties board for the transition.
You can change the screen that a transition uses.
You can configure advanced transition options such as conditions, triggers, validators, and post functions.