"...I can now easily set up projects for my staff and email all from a single program! I no longer need a separate email program, calendar and project management system to keep all my contacts, projects, tasks and company departments - I can do it all with VIP software. Thanks for making my life easier!..."
This functionality is available if sorting by any of the fields is absent and it gives you a possibility to arrange tasks in required order, for example in the order in which the tasks are to be executed.
To cancel all the selected sorting, right click on any column header and choose the item Clear Sorting in the context menu.