I have a column in my table which is department which has values as engineering and non-engineering. I need to implement this as a filter in tableau dashboard but it should show only one option which is non-engineering checkbox. So by default it should show only engineering department and if I click on the check box it should show both engineering department and non-engineering department.

Only non-engineering should be optional.

I tried to create parameters and control the filter but still it is not working as expected.