I want to calculate the sensitivity using G*Power. If I have understood correctly G*Power gives me the detectable effect size for three-way interactions if I enter the number of groups (meaning the number of factors) and number of measurements (meaning the number of factors). But what do I do if I am also interested in the power for main effects and two-way interactions? My hypotheses regarding the experiments were about main effects and two-way interactions, not the three-way interaction. I have difficulties finding a good source that helps me understand this.

Can anyone give me a hint or recommend me some article, please?

Thank you!