Can I edit project details without leaving Project Planner?

Yes. You can update project details such as Status, Start Date, Due Date, Percent Complete, and Project Manager directly in Project Planner. Click an allocation row to open the inline edit dialog and make changes without leaving the screen. To open the full project record, click View {Project} next to the project name in the dialog. The link opens the Project Edit page in a new tab when you have read access to the Project module. {Project} reflects the custom label your company uses for Project.