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Functional details of this screen can be found in detail here - Project restrictions & Global fields Jira admin facing screen
In-project screen
As the name suggests, this screen can be accessed from within a Jira project.
Within any software project’s left navigation, you will see the ‘Release planning & reports’ link - assuming the app is already installed & the instance level configurations are set up appropriately.
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Functional details of this screen can be found in detail here - In-project screen