You may notice that you can't make changes to a custom question/field that is already added to your campaign. To make updates to existing questions/fields, you'll want to click on Custom Fields in your Flipcause Dashboard.
Navigate to the question you'd like to change, an click edit.
Make the changes needed and click Save Changes. Keep in mind that this is alsowhere you will want to specify if this question is required or optional.
This will update this question in all of the campaigns in which the question is already added, the updates here are propagated to all related campaigns automatically. This means that this change will be effective immediately on all live campaigns in which this question is included, and no additional steps are necessary to publish the change.