Where is iView "Isolation Method"?

Hi Portal Knowledgeable ones.

I am on EP6 SP13.

According to help.sap.com, an iView property called "Isolation Method" exists. However, I see no property called "Isolation Method" in edit mode for the iView. I even looked through all the iView property values in "Show All" mode. None prompt for "URL" or "Embedded" either.

What happened to this parameter?

Thanks.

Kevin