Optimization solver

Hi community

I have a question in regard to the optimization solver i am using in my model. In the "Optimization Solver" window (Study -> Optimization), under "Solution:" i have an option to select the solution method. The options are:
- Auto
- Use first
- Use last
- Sum of objectives
- Minimum of objectives
- Maximum of objectives

Does anyone know if it is possible to select a solution method based on "Mean of objectives"??
What I want is to maximize the sum of my objectives and then divide them by the number of objective evaluations, which will give me the mean of my objectives.