How do I setup the ILS Indicater

How do I setup the ILS Indicater to show the proper glide scope of the RWY that I want to land on???
I already know how to setup the nav freq. but it does not seem to work on showing the proper alignment with the RWY...... Thank you
I already know how to setup the nav freq. but it does not seem to work on showing the proper alignment with the RWY...... Thank you