Changes to pdf files with Acrobat Reader?

I have searched the Be Communities and have found some allusions to being able to create pdf from MicroStation that can be commented on with Acrobat Reader.  Is it true?

I can't seem to be able to do anything with the Reader to files I created with XM pdf.plt driver.  Is this an Acrobat limitation?

 Here are the pdf.plt settings:

CmdName /appname="pdf" /command="AllowPrinting" /qualifier="1"
CmdName /appname="pdf" /command="Version" /qualifier="Acrobat 7 (PDF 1.6)"
CmdName /appname="pdf" /command="AllowChanges" /qualifier="1"
CmdName /appname="pdf" /command="EngineeringLinks" /qualifier="On"
CmdName /appname="pdf" /command="RGBRasterCompression" /qualifier="zipped"
CmdName /appname="pdf" /command="LevelLabel" /qualifier="DisplayName"
CmdName /appname="pdf" /command="SearchableText" /qualifier="on"
CmdName /appname="pdf" /command="PrintOptionalContent" /qualifier="AsDisplayed"
CmdName /appname="pdf" /command="EnablePlotTo3D" /qualifier="on"
CmdName /appname="pdf" /command="EnableOptionalContent" /qualifier="On"
CmdName /appname="pdf" /command="SetPageFromPlotSize" /qualifier="off"
CmdName /appname="pdf" /command="BookMarks" /qualifier="On"
CmdName /appname="pdf" /command="DocTitle" /qualifier="$(basename(_DGNFILE))-$(MS_PLTMODELNAME)"
CmdName /appname="pdf" /command="OwnerPassword" /qualifier="pdf" 

The attached image shows what Acrobat displays as the resulting security settings.

I am using Microstation XM 8.9.4.51, Acrobat 8.2.0