This cool feature allows you to adjust all of your subtask and nested subtasks due dates by only changing the parent task due date.
The subtask dates will be increased (or decreased) by the change you make to the parent task Due Date.
Note: This will not work if you don't already have a task template created
Where: This feature is used when you create a task from a template
After loading a template, you'll see this option at the bottom:
Let's use the following example:
Parent task due: July 10
Subtask 1 due: July 1
Subtask 2 due: July 3
I then remap the parent task due date to => July 20
Since this is a change of 10 days (July 20 - July 10), all subtasks will also be increased by +10 :
Subtask 1 due: July 11
Subtask 2 due: July 13
Also see related feature: Automatically remap subtask due dates