Click on Venues in the left menu bar.
Click on the blue Add Venue button
Search for an existing venue by filling out the fields and clicking the check button. If you do not see the venue, click "+Create New Venue". Fill out the information and click "+Create New Venue" at the bottom of the page. There will be one more check to ensure that duplicate venues are not being created. If the venue still does not appear, click 'Create New Venue".
Select the created venue
Click on the Fields tab and then click the blue New Field button.
Fill out the field information and Save