Team composition for the multi-project capstone course iPraktikum is currently supported by single-objective optimization. This approach can be improved by using multiple objectives and finding an optimal solution in an iterative way. However, multi-objective approaches are more difficult for the user to understand, especially when it comes to trade-offs between objectives. The main goal of this thesis is to create a user interface that visualizes trade-offs and outcomes of each iteration in an understandable, easily usable way. Four candidate user interfaces are created based on the elicited requirements and evaluated in a user study, leading to an optimized user interface combining the best features of the candidate interfaces.