We use Trello for design project tracking. When we have a proof ready for a customer, we drop the file on the Trello card, Butler automatically moves it to the “Proof Ready” list. Then Zapier takes over and sends the proof to the customer. The next step in the Zap moves the Trello card from the Proof Ready list to the Proof Sent list. It also updates the custom field, “Proof Sent” with the current date and time. There is also a custom field designed to track the number of times a proof has been sent. To explain, if a customer hasn’t responded to the proof within 2 days, Butler is set up to automatically move the card into the “Proof Ready” list - that way Zapier sends the proof again. I don’t want to continuously send proofs, so, I have a custom numeric field set up as a counter so that Butler won’t repeat the process more than 3 times. However, I can’t figure out how to make Zapier update the custom field by 1 when it runs. Any suggestions?