How to link a group of Accept Event Actions to a signal?

I would like to create a Signal in the model (by select New Model Elements and select Signal type)…then I would like to link this signal to different Accept Event Actions in Activity Diagram. The purpose is that I can easily find which Accept Event Action link to this signal later on.

However, in the Accept Event Action Specification, it can only link to the signal that creates inside this context. It does not see the signal that i already created in Model.

Please advise.