You can also use Paste The Plan on Brent Ozar's site. I believe Erik Darling wrote it.
Right-click on your execution plan and show the XML. Copy and paste that into the website. It will show the plan and give you a link to that plan that you can then share with someone else. For instance:
will show the plan that was generated when I ran:
SELECT * FROM sys.databases AS d WHERE d.database_id < 6