Is there a way to custom function of interface?

seems when interface define function which no return result.
that will auto generate a yellow color event.
has return result that will be blue color function.
can i custom use event or function? not auto generate.

Right click and Implement.

But you do not get to choose between event / function. As you said, it’s based on return. Add dummy data to turn an event into a function.

One note, even though the target actor has no interface, the function will return data - whatever defaults were set in the blueprint interface. This can lead to some freaky debugging scenarios.

ok, the feature how strange