This special property determines how the cursor should display in the grid. When this is set to a positive value, the cursor displays a frame that many pixels thick around the cursor's cell. The frame extends partially into the cell and partially outside the cell. When this property is set to a negative value, a light dotted line is drawn around the cell's contents. The absolute value of this property is the number of blank pixels between the cell's border and the dotted line. When it is set to zero, no cursor frame is drawn. The default value is 3.