I understand you are concerned of seeing too many attributes in PI Coresight. You are asking for a way to limit the amount of Elements / Attributes.
Are you referring to the amount showing within a single display or when performing a search? I can only assume the latter is the case.
Have you tried limiting the amount of attributes returned by your query by specifying a more precise search string?
We have open an "OSIsoft TechSupport Case". The issue is a TimeOut when trying to search for Element of samt Eleemnt type...
Thank you !