By default, the DrawLevelSeparator property is exLevelDefaultLine ( dotted line )  Use the DrawLevelSeperator property to draw lines between levels inside the chart's header. The DrawTickLines / DrawTickLinesFrom property always draw the vertically lines in the level, while the DrawLevelSeparator property draws the horizontally lines in the level. Use the DrawTickLines property to specify whether the grid lines between time units in the level are visible or hidden. Use the DrawGridLines property to specify whether the control draws the grid lines in the chart's area. Use the GridLineColor property to specify the color for grid lines. Use the DrawGridLines property to specify whether the control draws the grid lines in the items area. Use the DrawGridLines property to draw grid lines for a specified level. Use the NonworkingDays property to specify the nonworking days. Use the NonworkingDaysPattern property to specify the brush to fill the nonworking days area. Use the MarkTodayColor property to specify the color to mark the today date.