If you want to change the frequency or amount of an existing recurring payment profile, you can do through the Modify setting located on the recurring payment profile page.
To adjust the recurring frequency and amount, go to Contributions > Recurring Profiles.
2. Use the search field to find the supporter's recurring profile, and open the profile by clicking on the magnifying glass.
3. This will open the recurring payment profile page. Select Modify in the upper-right-hand corner.
4. Change the cycle frequency and amount due for each cycle.
5. Don't forget to Save.