The CAD Sheets tab displays sheets created in the authoring tool and includes Markup tools.
CAD Sheet Tab
Since the CAD Sheet tab is available on the Assemblies > Viewer and the Packages > Viewer, the information is consolidated in the Viewer CAD Sheet Markup article for more information.
The CAD Sheet tab displays sheets created in the authoring tool. Once in STRATUS, tools can be used to Markup the sheet.