The Pandora software comes with a variety of marks, of which the description can be found in the Pandora User Guide.
The label marks contain placeholders for text. You can place label marks anywhere on a substrate (press sheet) and the Pandora software replaces the placeholder text with the variable text from the job. The mark color is set by default.
A Mark Set is a folder of marks that you can apply to the jobs by dragging the folder from the Marks palette. SmartMarks included in the mark set retain their smart functionality and position themselves automatically. Simple marks land on the job in a stack and you drag each mark into place.