AdvancedFocusing loopAdvanced settings Plot history length Not available nor applicable with SkyGuide Plot history sets the number of iterations that will be displayed in the focusing plots. In most cases, 50 iterations are sufficient. The default value is 50 samples. Copyright © 2016-2019 by Innovations Foresight LLC and David Lindemann. Patented US10264164B2 and others. All Rights Reserved.