Final answer:
Dave should select the User Stories to back-promote when using the Back Promote button; it is the necessary step to maintain consistency across different environments in a pipeline.
Step-by-step explanation:
When Dave is using the Back Promote button from the pipeline page, the next step he should take is to select the User Stories to back-promote. This action is necessary to specify which changes are to be moved to a previous environment in the pipeline. The intention behind the back promotion is to maintain the consistency of User Stories across different environments, which can be crucial for testing and stability purposes.
It is not normally required to manually update Promote and Deploy checkboxes or contact Copado Support for assistance for standard back promotion operations. Instead, he should review the User Stories in the Promotion Record after the selection to ensure accuracy before proceeding.