Change the project leveling priority

Choose Enterprise, Projects and display Project Details.
Click the General tab, then select a leveling priority from 1 (highest priority) to 100 (lowest priority).

During leveling, this number determines which assignments from other projects to consider within the leveling run. For example, if you specify 5 in the Consider Assignments in Other Projects With Priority Equal/Higher Than field of the Level Resources dialog box, all projects with a project leveling priority of 1, 2, 3, 4, and 5 are considered.
Note:
- If you are selecting a priority level for an EPS node or project, your selection may affect the order in which the project's activities are leveled. If you level a project according to project priority, all activities in the higher priority project are leveled, and then activities in the lower priority project are leveled.

Tip:

You can include assignments from closed projects during leveling by marking the Consider Assignments in Other Projects With Priority Equal/Higher Than checkbox of the Level Resources dialog box. Indicate a Project Leveling Priority for those projects on the General tab in the Projects window.
To use the priority level as a tie breaker during leveling, include Project Leveling Priority under Leveling Priorities in the Level Resources dialog box.