Six small circles on the component indicate the type of fixation: The first three correspond to translations in global x, y and z-direction, the last stand for rotations about the global x, y and z-axis. Filled circles indicate fixation which means that the corresponding degree of freedom is zero. The state of each circle can be changed by clicking on it. In addition to the radio bottons the supported degrees of freedom can also be specified parametrically using the input-plug "Dofs". It expects a list of integer values where the numbers '0' to '5' stand for Tx to Rx. Right-click on the component and select 'Expand ValueLists' to get a ValueList-component as shown in fig. 22.214.171.124.