If you have a timescale in a Gantt chart spanning several years, but still want to be able to see every single day or even the hours in a day, you will soon find that the horizontal scrollbar becomes very sensitive. The smallest movement leads the timescale to shift several days into one or the other direction, even if smaller intervals are required as you look for a specific date and time. This behaviour can result in some unwanted user experiences for the planner working with your scheduling application.
This blog post belongs to a series of Gantt best practices that we regularly publish relating to our Gantt control VARCHART XGantt. This trick describes how to extend the mouse functionality to also use the timescale as scrollbar.