The applet lets you review constructions for parabolas anf hyperbolas. The center of the conic can be moved by dragging. The major axis is parallel to the x-axis. The distance from the center to a vertex on the major axix and from the center to a focus are controlled by sliders.
This was originally constructed with release 2.7. It is being uploaded to GeoGebraTube as an exercise to see if it runs on an iPad