This menu consists of just two entries. Since a "MultiJoint" has no dimensions, it does not carry any settings for changing its size or orientation in space. You can see the joints from the moment they have been created.
Simulation
By default, a "MultiJoint" contributes to a simulation, so this parameter is set to “Yes”. In many cases it is necessary to simulate a scene without the influence of certain nodes – in this case choose “No”. “Cache” is used to start a new simulation, based on previously recorded (=cached) data.
Color
Each RealFlow node can have its own RGB colour. Choose your favourite combination here to colour the connectors.