ISAT: Orbital Parameters - Apogee & Perigee
This video shows how the Orbital Elements of either Semi-Major Axis & Eccentricity or Apogee & Perigee can be used in STK to adjust orbit size and shape. Most students usually find working with Apogee & Perigee to be more approachable, and thus is recommended. Further, this video shows how adjusting these parameters results in changes in ones orbit.