Hi John Annis,

Happy Holidays!  I believe this information from the Maps Help menu for Yosemite will is what you are asking about:

OS X Yosemite: Apps included with your Mac
http://support.apple.com/kb/PH18738

Maps

Get directions to or from a location—including current traffic conditions—and quickly send the directions to your iOS device.

 

Open Maps Help for me

Save a location to use later

You can save routes and locations so you can refer to them later.

Open Maps for me

Save a favorite location

1. On your map, go to the location you want to save.

2. Click the location’s pin, then click the Info button .

   If the location doesn’t have a pin, drop one first (choose Edit > Drop Pin).

3. Click Add to Favorites.

   You may have to scroll to the bottom of the window to see this option.

To view your favorites, click the search field, click Favorites, then click Favorites in the sidebar.

Cheers!

- Judy