When you create a new task in Gantt, or plot an unscheduled task on the Gantt's grid, the task will be given a start date and duration by default. However, the due date of the task is not automatically set.

To add due dates to tasks in Gantt, you can:

Double click on the task and set the due date in the task details view

Batch add due dates to all tasks based on the duration by clicking "Set due dates to duration" in the Gantt options menu

When a task has a due date it will be shown on the Gantt grid with red clock icon

Note: If you set a due date on a task anywhere else in Rindle it will display on the Gantt grid.

To remove due dates in Gantt, you can:

Double click on the task and click the due date, then clear out the date

Batch remove due dates from all tasks by clicking "Remove all due dates" in the Gantt options menu

By having a start date, duration, and due date the Gantt can enhance scheduling by letting you know when you have scheduled a task beyond its due date.

For example, let's take this task to clean up the project documentation. It has a duration of 2 days and a due date of February 26th.

If this task is pushed out by changing the start date or duration of the task, the task will be flagged with how many days it will be overdue without changing the actual due date (and potentially sending out a date change notification to the assigned team member). 

In this case the task will now be 2 days overdue if I change the duration from 2 to 4 days

It will also do the same if I leave the duration at 2 days but move the task to now start two days later

With this information you can then decide to change the due date or adjust the schedule accordingly.