If you select the FIELD button from the CONTROL window you can proceed to create a new field. Edit or delete an existing field.
CREATE - FIELD
Supply a name for the new field in the name field
Type the x component of the field.
Type the y component of the field.
Type the z component of the field.
Finally type the name for a quantity.
The particle that will interact with this field must have a quantity that has the same name as the above quantity.
EDIT - FIELD
Select an existing field from the list. Then edit any parameter of the field.
DELETE - FIELD Select an existing field from the list. Then select the DELETE button

If you select the GRAPH button from the CONTROL window you can proceed to create a new graph. Edit or delete an existing graph.
CREATE - GRAPH
Supply a name for the new graph in the name field
Select a particle from the list.
Supply a name for the new graph window in the monitor field
Type expression to be on the x Axis.
Type expression to be on the y Axis.
The x axis of the graph is usually time the y axis is any formula containing parameters of a specific particle. The parameters can be x, y, z (position components) vx, vy, vz (velocity components) m, mass t, time.
EDIT - GRAPH
Select an existing graph from the list. Then edit any parameter of the graph.
DELETE - GRAPH 
Select an existing graph from the list. Then select the DELETE button

If you select the ENGINE button from the CONTROL window you can proceed to select the numerical method to be used, and set relevant parameters for the method selected.
EULER
This selection uses the  Euler method to solve the dynamic equations.
MODIFIED EULER
This selection uses the modified  Euler method to solve the dynamic equations.
FOURTH ORDER METHOD
This selection uses a fourth order method to solve the dynamic equations.
ADAPTIVE METHOD
This selection uses an adaptive method to solve the dynamic equations.
SET PARAMETERS
Using this selection you specify three parameters. The first is the time interval used by the first three methods. It determines how often to calculate the force position and velocity of all the particles.
The next one specifies the maximum allowable time interval for the adaptive method.
The last is the error tolerance of the adaptive method.