When editing multiple tasks it would help to have the option to select / unselect all tasks at once.
It is very nerve-racking to select each task individually when you need to apply a change to all tasks in a long task list. This happens to me quite often when I reorganize my tasks, but also in daily business, for instance when I use checklists. In checklists this would be an easy way to reset the list, e.g. a shopping list.
Samples of application:
I've reported this to our development team for further review, we're sorry for the inconveniences caused.