On the tool bar it is possible to choose the field.
By clicking, the vector remains on the screen.
By clicking button , in the case of several
charges, the program draws also the vectors that represent the fields created by any charge.
By clicking button the program erases the vectors
drawn on the screen.
By clicking button the program draws the lines
of force.
By clicking button you can charge another language.
Button opens this help windows.
On the status bar, the following values are shown in arbitrary units of measure: