When you work with multiple projects, you can designate one project as the project that opens by default. You can also specify which project's settings to use when you schedule or level, and which project to use by default when you add new information to the database.
- Choose Project, Set Default Project.
- Mark the checkbox in the Default column next to the project you want to open by default.
This project's scheduling and leveling settings are used for calculating the schedule (manually or via the Job Services feature, when connected to a P6 Professional database) and it becomes the default destination for new items such as activities or issues unless you group data by WBS and select a different project before adding new items.