Firstly, select the task(s) that you wish to postpone in the tasks list.
Click 'Postpone' or use the shortcut key p.
The selected task(s) will be postponed by 24 hours.
Note: In the case of tasks that were already overdue, the new due date will be today.
The number of times that a task has been postponed is shown in the task details box on the right.