Restrict portal users from changing fields to display

Hello Tyler, 

1. Create Replacing View Model and choose the Parent Object - "PortalCaseSection"

2. Add next code to this schema:

define("PortalCaseSection", [], function() {
  return {
    entitySchemaName: "Case",
    details: /**SCHEMA_DETAILS*/{}/**SCHEMA_DETAILS*/,
    diff: /**SCHEMA_DIFF*/[
        {
             "operation": "remove",
        "name": "SeparateModeViewOptionsButton"
        }
    ]/**SCHEMA_DIFF*/,
    methods: {}
    };
});

3. As a result, "View" button option will be hidden for Portal Users: 

Best Regards, 

Bogdan L.