Be able to see ALL Tasks without date filter

In my Dashboard, I can see my tasks. But if I enter the "Tasks" Section, a filter is preset. I can adjust the filter, but not open ended. And I want to see ALL open tasks and not just the tasks of the last 30 or 60 or 90 days. Because some tasks might lie further in the past and I don't know where the first task starts. It would be really helpful to disable the date filter or set it on "ALL time periods".