The line properties editor is used to visually edit the lines and borders displayed by the Xceed Chart for WinForms component. As well as standard Color and Width line settings, the user can also specify the line's Pattern either by choosing a predefined pattern (Solid, Dots, Dash, Dash-Dot, or Dash-Dot-Dot), or by creating a custom one visually. 

The Factor numeric spincontrol represents how many pixels are used to display the current Pattern. By default it is set to 1, which means that a Dot style, for example, is displayed with one pixel per dot. If the Factor is set to 2, the dots displayed will have a width of 2 pixels. 

For more information, please refer to the Lines topic.