1. Launch and sign in to the app if you have not done so.
2.  While in the app, tap the navigation button.
3. Tap Periods and Goals.
4. Tap the add button.
5. This should launch the performance period editor.
6. Enter a period title.
7. Enter or select a period start date.
8. Enter or select a period end date.
9. Tap apply.
10. Your performance period list should now be updated with your new period.