Field lines, which show both the amplitude and direction of an electric field, can be drawn to visualize it.
The electric field lines start from the positive charge and end at the negative charge.
The field line's direction at a given place is the field's direction. The density of the field lines determines the magnitude of the electric field's relative magnitude.
The field is strongest when the field lines are near together, and weakest when they are far apart. A uniform field is one in which the lines are evenly spaced and parallel.