If a client has an active pack and you wish to add or remove credits from that pack, follow these steps:
1. Click on Contacts > My contacts and look for the client.
2. Then locate the pack you'd like to edit the credits from, under the Memberships tab. Click the 3 dots next to the pack's name and then Edit credits.
3. Use the arrows or manually add the number to add or remove credits and then click Save.