No matter how many projects you have open, you can only work on one project at a time. The project being worked on is known as the active project. You can identify the active project as its title bar is highlighted and its name appears in the title bar of
To make another project the active project, click anywhere on its window or click its tab. That project is then brought to the fore in the Powerproject window and its title bar is highlighted, indicating that it is now the active project. Any actions you now perform are applied to this project.