PLATFORM - Administration > Administrator Guide > Data Reading Access > Configuring Data Reading Access > Managing MetaClass Sensitivity and Reading Access Areas
Managing MetaClass Sensitivity and Reading Access Areas
*The attribute enabling configuration of MetaClass sensitivity is accessible only if you have the HOPEX Power Supervisor technical module.
In the reading access management frame:
• a user is connected to a reading access area that defines all the objects he/she can see.
• an object type (MetaClass) is characterized by its sensitivity.
A MetaClass can be of sensitivity:
• standard (default value)
Occurrences of the MetaClass created by a user belong to the user reading access at creation area or the Standard reading access area if the user does not have a reading access at creation area.
• High
Occurrences of the MetaClass created by a user belong to the reading access area of the user that creates them.
*To modify the sensitivity of a MetaClass, you must have rights to modify HOPEX data. The option "Authorize HOPEX Data Modification" must be activated at environment level, see Options.
You can modify sensitivity value of the MetaClass.
*By default, a MetaClass is Standard sensitivity.
Opening the HOPEX MetaClasses reading access configuration dialog box 
To open the HOPEX MetaClasses reading access configuration dialog box:
1. From HOPEX Administration, connect to the environment.
2. Expand the User management folder of the environment.
3. Right-click the Data Reading Access folder and select Configure HOPEX MetaClasses for reading access.
The HOPEX MetaClasses Reading Access Configuration dialog box appears, listing the available MetaClasses.
The icon alongside the name of each MetaClass indicates that default values:
• have been modified
• are retained.
Modifying MetaClass sensitivity 
To modify MetaClass sensitivity:
1. Open the HOPEX MetaClasses reading access configuration dialog box.
2. In the list of MetaClasses, select the desired MetaClass.
3. In the right pane, select the MetaClass sensitivity value:
*A red cross alongside the name of the MetaClass indicates that at least one attribute of the MetaClass has no longer its default value.
4. Click OK.
*Modifications carried out may be canceled when your environment is updated. Remember to back up your extensions (metamodel and technical data).
Hiding confidential or sensitive objects in a diagram 
So as not to distort a diagram, confidential or sensitive objects are visible by default.
To hide confidential or sensitive objects in a diagram:
1. Open the HOPEX MetaClasses reading access configuration dialog box.
2. In the list of MetaClasses, select the desired object.
3. In the right pane, in the Confidential objects display in diagrams box, select "Confidential objects are hidden".
*A red cross alongside the name of the MetaClass indicates that the MetaClass default value has been modified.
4. Click OK.
*These modifications are not taken into account in the metamodel until the metamodel is compiled. Compile the metamodel before closing the HOPEX Administration module, see Compiling an Environment.
Objects corresponding to this MetaClass will be hidden in the diagram.
*When you select "Confidential objects are visible", objects corresponding to this MetaClass appear grayed in the diagram and you cannot access information relating to these objects.
*Modifications carried out may be canceled when your environment is updated. Remember to back up your extensions (metamodel and technical data).