On the Responses tab of a transmittal you can view all of the responses received so far for all of the documents in the package.
When you open a transmittal in ProjectWise Explorer, as long as an import storage location is defined, a copy of each file attached to the incoming responses is automatically imported to the designated subfolder for these documents in the work area.

When Recipient is set to All, then all of the package recipients and their responses (if any) are displayed in the lower Responses tab that opens within the main Responses tab. When a specific recipient is selected, then only that recipient and their response (if any) is displayed.