The arrows between the Gantt chart indicate the relationship between the tasks before and after, more professionally speaking, is the dependency between the tasks or before and after the relationship, for example, the first two tasks before the arrow, which indicates that after the completion of the "xx arrangement and planning", "the opening ceremony The Opening Ceremony can only begin after "xx Arrangement and Planning" has been completed. With thinkine, a professional software for project management, you can nicely turn on the "linking" feature, and at the same time, you can show the health status and overdue status on thinkine's Gantt chart.