You can upgrade, downgrade or cancel your pledge or reward anytime before the campaign ends. Do this by visiting the project page and clicking the blue “Manage” button that appears next to your pledge amount. To change the reward, on the next page, just select the reward you'd like to receive. To change your pledge amount enter a new amount in the pledge amount box. *Note that you are not adding to your existing pledge; the amount you enter will be the total amount collected if the project is successfully funded.