Create a baseline

Open the projects for which you want to create a baseline.
Choose Project, Maintain Baselines, then, if more than one project is open, select the projects for which you want to create a baseline.

If you want to copy the current project as a new baseline, you can select multiple projects; a baseline will be created for all selected projects. If you want to convert another project to a baseline, you can select only one project.
Click Add.
Choose to save a copy of the current project as a new baseline or convert another project into a baseline of the current project, then click OK.

If you choose to convert another project, select the project in the Select Project dialog box, then click the Select button.

Tip:

Before converting a project to a baseline, if you still want to have access to the original project, you should make a copy of it. Once you convert a project to a baseline, it is no longer available in the project hierarchy. You can restore a baseline, making it available again as a separate project in the project hierarchy. You can also update a baseline with new/modified data from the current project.
Note:
When you save a copy of the current project as a new baseline, the baseline title uses the project name and a suffix of - Bx, where x equals 1 for the first baseline you save for a project, 2 for the second, and so on. You can change the baseline name.
When you choose to convert another project to a baseline, the project you want to convert cannot be open or have baselines assigned to it. The converted project's name is used as the baseline name.
When connected to a P6 EPPM database: P6 Professional uses a job service to create the baseline. This means that you can carry on working while the baseline is created in the background. To see the progress of the job, choose Tools, Job Status.