Filter tasks, projects, and even certain reports, according to the criteria you specify. For project/task filtering, click the Filter button at the top in the Projects area.
In the frame that appears, use the selections and drop-down menus to choose your desired filters and then click the APPLY FILTERS button.
The default view of the Projects area shows Active projects only. To view projects in a Completed (or any other) state in the Projects area, click the Filter button at the top of the screen. In the frame that appears, select from the different Project State options, then click the APPLY FILTERS button.
NOTE: When filtering for Responsible or adding advanced filters for Category equals, you can select multiple options which will filter to include any rows matching any of the selections (i.e., this or that).