This article describes the process used for creating recurring donation options offered in Gala/Online/Virtual Auctions and/or during ticket sales. It can also be used for fundraising campaigns, though the fundraising campaign setup wizard offers a simpler option.
Cash Donation Options can be configured to collect one time and/or recurring (monthly) donations. The same form is used for both, with an additional section to configure recurring donation settings.
Go to Site Settings > Items > Cash Donations Options to add (or edit) a recurring donation.