I guess I asked the question wrong...In the iPad app Aerofly, the panels are not active for me to engage ILS by selecting the MCD panel switches.
In that case let us say, I position at 3000 feet and about 8nm from SFO 28L. On my iPad what selection should I make to have the plane land by ILS... I am able to see the plane is centered and below glide slope, as the plane intercepts the slope it doesn't descent....What options should I on the screen for the ILS descent.