The first column in a Gantt spreadsheet displays graphical indicators that shows special conditions that may exist for tasks in that spreadsheet.
Indicator Description
image The task is 100% complete.
image The task has a note.
image The task has a date constraint.
image The task has missed its deadline.
image The task uses its own calendar.
image The task does not have enough available working hours in the task and/or resource calendar. The assignment cannot be completed as originally scheduled. Rare. This is sometimes referred to as non-intersecting calendars.
image The task is a parent task to which resources are assigned.