How to switch into another pledge level
If a project has allowed the option for its backers to switch to another pledge level, then you'll be able to do so in the beginning of your survey.
Below is where you'll need to click to switch to a different pledge level:
You'll be able to switch your pledge level anytime while you're in your survey as well. Towards the top left of your survey you'll see your pledge level along with a hyperlink of your reward price. If you click that hyperlink that will take you where you'll need to go to switch your pledge level. Please refer to the screenshots below for further help.