The label configuration defines which labels and classifications are available for the current project. You can define geometries for labeling, attach classifications to them or create global classifications for more general questions. You can customize the geometries' colors so they won't clash with your datasets and set up shortcuts to speed up the workflow.
Classifications can be set as required so that users have to fill them out before continuing with the next task. You may edit the configuration anytime you like. All finished tasks will be automatically re-enqueued so that new configuration items can be added by your labelers.