When you hit setup the following characteristics update:

     1.  E-field Lines

     2.  Parallel Plate colors

When you hit setup and go the following characteristics update:

     1.  E-field Value and E-field vector

     2.  Force Value and Force vector

     3.  Charge in the field value and color of charge

     4.  Mass of the charge in the field and size of the charge

The positive plate and positive charge in the model will be Red. The negative plate and negative charge in the model will be Blue.