Creating Navigation Attributes 
Prerequisites
You are in InfoObject characteristic maintenance and have selected the tab page ‘Attributes’.
Procedure

So that you can use the characteristic as a navigation attribute, make sure the InfoObject is assigned as an attribute first, and that the option ‘Attribute only’ is not activated for the characteristic on the tabstrip ‘General’.

If you turn a characteristic attribute into a navigation attribute, assign a text to the navigation attribute, so that it can tell it apart from a normal characteristic in reporting.
Result
You have created a characteristic as a navigation attribute for your superior characteristic.
Further Steps to Take
You must activate the created navigation attributes in the InfoCube. The default is initially set to "off" so as not to implicitly include more attributes than are necessary in the InfoCube.
Note that you can subsequently create or activate navigation attributes in the InfoCube at any time. Once an attribute has been activated, you can only deactivate it if it not used in
aggregates.In addition, you must record navigation attributes in queries, so that they are taken into account in reporting.