To add giving levels:
1. Go to the EDIT panel
2. Click Add Giving Levels on the left-hand side
3. Then, click on the green Add Giving Level button to fill out the relevant fields. Hovering over the grey ? icon beside a field shows information about it
4. Be sure to click the green Save Changes button
5. Repeat step 3 to add multiple Giving Levels
6. Finally, hit the Save & Next button at the bottom of the page