Show at-a-glance
ahead/behind status with the status line.
The status line extends vertically along the current date line. The
status line bulges to the left or right according to each task row's
status date. Thus, the status line is a visual indicator of ahead/behind
status.
In the first task row below, the status line extends to the left of the
current date line, indicating a task which is behind schedule. The
second task is on schedule to the current date. The third task is ahead
of schedule.
Access this setting under
Format | Dates | Current Date | Status Line
Properties.