To see a context view, click the large task selector button in the middle of Trog Bar, hover over Categories until the list pops out, then click the category. A list of recent Categories also appears at the bottom, before the category list pops out.
You can also click any hyperlinked category when looking at it in Trog Bar.
Outlook’s task list shows you all tasks for all categories, grouped by category. Right click any category group header and select Collapse All to see all the headers. Click + next to any header to expand that category and see its tasks.