The Package originator has the ability to enable or disable the Review Documents option while creating a VSR Package. When creating and customizing a VSR Package, click on the Reviewing tab in the Package Options.
Under Reviewing, there is a Documents toggle switch to enable or disable the ability for the signers to review the documents in the Package before signing. By default, the toggle switch is enabled.
You can keep this option enabled or disabled for all your future Packages by
updating the Signing Defaults values: Set Your Signing Defaults