By default, the AdjustLevelsToBase property is False. Use the AdjustLevelsToBase property on True, in case you are using a not-contiguous time scale, so you need to align the tick lines from different levels. For instance, if the ShowNonworkingUnits property is False, the AdjustLevelsToBase property is automatically set on True, so the time scale is aligned to the base level. Use the DrawLevelSeperator property to draw horizontally lines between levels inside the chart's header. The DrawTickLines / DrawTickLinesFrom property specify whether the vertically lines between time-units are shown in the level.