Correct. It's optional. SkyView HDX - in particular - has on on-screen interface that very closely mirrors the look and feel of the actual control panel. With SkyView Touch and Classic there are button-based menus for all of the controls too, but the SV-AP-PANEL is more valuable there. If you're using simplified mode (not suitable for IFR), all of the menu options collapse down, so that's something else to consider. It doesn't have as much flexibility as expert mode, but many people find it more than meets their needs, with the ability to hold and change altitudes, direction, and even follow flight plans.