When this option is selected, the following panel is shown:
Source Display Size panel
This option allows the user to scale the sources represented in the geometry view. The user needs to indicate the factor of scale. Pressing OK will cause the sources in the geometry view (and the new created sources) to be scaled. The Auto Size button allow the user to perform this task automatically. Note that this parameters only affects the visualization of sources in the geometry view and has no impact in the simulation.