Navigate to the project
Select Project Settings from the project navigation drop-down menu
Click Edit and setup response times and default reviewers:
Designer Response Time: number of total agreed-upon days that a Designer can have to respond to an RFI
Internal Response Time: number of total days that the Internal Reviewer can have after receiving an RFI to review and submit to the Designer
Default Reviewers: Internal project team members that are to be included on every RFI for the selected project for visibility.
You can now also set specific review durations per each priority noted.