When defining loads in Designer you can now choose to use the new Geometry Interface load definition.
To define a load between two geometry parts simply choose one of those parts then choose the interfacing part. Below is an example of defining a load using this new method.
Once the load has been defined click Create Load the load will appear in the Context Menu like normal where a time function can be assigned to the load and the load type can also be changed. Here the bounds of this load can also be changed.
Geometry interface loads can also be defined between the interface of a part and the boundary of the model.