Once you have created a group, you can insert users into it.
        
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                Select  to open the List of Groups.
            
 
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                Select a group in the list, click the Properties tool to open its property sheet and then click the Users tab.
            
 
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                Click the Add Objects tool to open a selection box listing the users available in the model.
            
 
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                Select one or more users and click OK to insert these users into the group.
                
            
 
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                Click OK.