title: How to change the sampling time for all of the model blocks in Simulink?
body: <p>I have a model and I need to change the sample time of each block that I currently have in my Simulink model.</p>
  
  <p>The problem is that I have so many blocks that make changing this parameter for each individual one cumbersome. Is there a means to change it for a group of blocks?</p>
  
  <p>One more thing, what is the default sample time indicated by "-1"?</p>