When you open a new or existing calendar item, you’ll see this screen:

 

 

All you have to do is click on the Contacts button (which is circled in green in the picture above). This will bring up a window asking you to pick which contacts you want to link to this item. You can also pick which folder you want to use in case the contacts aren’t in your regular contacts folder. Here’s an example:

 

 

You can select just one contact from the list in the bottom part of the screen, or hold down the Ctrl key and click on multiple contacts. Once you’re done, click OK. Now you’ll see your contacts listed in the calendar window:

 

 

You can see the names of the contacts we’ve selected circled in green in the bottom left hand corner. Now, just click Save and Close to finish the process!

 

You can remove contacts linked to a calendar item by opening it and deleting the person’s name from the contacts field in the bottom left hand corner. Then, click Save and Close to save your changes.