Hi Firdea
Each tab is really just an alternative 'view' (or 'display') of the data displayed in the Task Tree.
They all show the same data except where settings on each of the tabs allow tasks to be hidden.
So it's possible to show less tasks on the other tabs but it is not possible to show more tasks.
Have you tried 'playing' with the calendar preferences to reduce the number of visible tasks, or perhaps you could suggest some other preferences that could be added to reduce the number of tasks?
Dan