You can print a legend that contains sample time information for your entire system, including any subsystems. The legend appears on a separate page from the model. To print a sample time legend:
In the Simulink® Editor, on the Modeling tab, click Update Model.
On the Simulation tab, click Print.
In the Print Model dialog box, select Print sample time legend.
A sample time legend appears on the last page. For example,
here is the sample time legend for the
with All systems enabled.