While the project is live
To change your reward selection while the project is still live, visit the project page and click the “Manage your pledge” button that appears next to your pledge amount.
On the next page, select "Change your pledge", and then select the reward tier that you wish to change to. If you are pledging without a reward, simply update your pledge amount. Remember, it's only possible to select one reward tier at a time.
After the project has ended
Please note that a pledge can only be updated while the project's funding period is live. If the project has already ended, you will not be able to modify your pledge amount or reward selection. If you need to seek out an alternative arrangement, please reach out to the creator directly.
To message a creator, visit the project page and click on the creator's profile name. This will open up their bio page where you can then click the blue "Contact me" button to send them a message via Kickstarter.