how to show propagated signals programticaly

how to show propagated signals programticaly like following, i have several subsystem block in my simulink model, now i want set this for all the line that connect with the inport port inside each subsystem, how to realize.

Answer 1

[Fangjun Jiang]

Find the handle of the sigal line, set "ShowPropagatedSignals" to be on. Alternatively, setting the name of the signal to be "<" could also do the trick. Remember to update the model to show the propagated signal. Ofcourse, the upstream signal needs to be labeled.

[wenchao zhang]

key point (Ofcourse, the upstream signal needs to be labeled), i think this is the reason why i failed, because no upstream signal is labed, even though i can get the parameter "ShowPropagatedSignals", but when i try to set this, no respond.