One topic in the document says this: "Box plots can be combinedwith basic plot types, reference lines, and other box plots. This feature appliesto SAS 9.4M1 and to later releases." https://documentation.sas.com/?cdcId=pgmsascdc&cdcVersion=9.4_3.4&docsetId=grstatproc&docsetTarget=p0yud64khw8fuin1xgr85dgxbb7t.htm&locale=en   However, other parts of the document state otherwise, as Reeza has pointed out. I apologize for the confusion and will update the document to be consistent.   Thank you for pointing out this oversight! ... View more

In the next release of the ODS Graphics Procedures guide, I will make sure that the information about box plot percentile boundaries has more visibility. Thank you for helping us improve the documentation. ... View more

We are always looking to improve the documentation. I will update the GROUP= option in the next edition of the SAS ODS Graphics Procedures Guide with this information. Thank you! ... View more