Hi,
it would be very helpfull to have some kind of reference lines in the Gantt chart. So the possibility to drag and drop e.g. dotted lines in vertical or horizontal direction in the Gantt chart.
Also a possibility to activate a grid which continues the lines of the table (left in the Gantt view) to the timelines and the dates in the vertical would be great (customizable to be able to make in the horizontal each layer of task structure a line, in the vertical to decide of a line after each day, week, month, quarter).
Sven