Using GreenHopper Simplified Workflow
Workflows control the transition between the different statuses of an issue. If you create your project using Jira project creation flow, the default Jira workflow will be assigned to your issues. If you create your project and board using the Getting Started page under GreenHopper, you can choose to use GreenHopper Simplified Workflow.
The main difference between Jira workflow and simplified workflow is that simplified workflow allows free transition of issues between statuses where Jira workflow has a condition that can be configured. On status transition, no screens are displayed for the simplified workflow, it is an instant transition. For Jira workflow, you may have additional status transition screens. Simplified workflow can only be modified in GreenHopper mode.
To check your board workflow settings, navigate to the Tools action, click on the Configure option and select the Columns tab.
Notice the Simplified Workflow option, displaying Using GreenHopper...