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The typical steps you would follow to define templates and make them available for use:
Install the app
Grant or revoke Project Creation permissions
Create, edit, or delete Component Schemes
Create, edit, or delete Version Schemes
Create, edit, or delete Project Role Schemes
Create, edit, or delete Project Templates
Create, edit, or delete Issue Schemes
Grant or revoke Project Request permissions
Configure questions to ask when someone requests a new project
Manage request notifications
View, comment on, approve, or reject an outstanding project request