Take a look at Navigating RSVPMaker: Event Posts, Options, Messages and Forms for a summary of the screens for setting options and customizing confirmation messages, reminder messages, and the RSVP Form. Some of these directions are specific to using RSVPMaker with the Gutenberg editor.
NOTE: Some of the screenshots in the older documentation linked to below are outdated. As part of a series of changes related to WordPress 5.0 and the new WordPress “Gutenberg” editor, many options that were previously displayed below the content editing area are now on a separate Event Options screen. The functionality hasn’t necessarily changed, just where you’ll find it. New functionality includes a form editor based on Gutenberg.
I’ve been adding documentation a little at a time, through the blog. Let me know what still needs to be explained better.
NEW VIDEO: Events and Event Templates. How to create single events or multiple events with the same basic schedule and boilerplate details. (updated for 2019)
Send Email Invitations or Other Messages with MailChimp. Email website members or event attendees, regardless of whether they join your MailChimp list.
RSVPMaker Shortcodes – coding for events headlines listing, calendar, or listing of upcoming events
Note: if you’re using the Gutenberg editor, visual components replace these shortcodes.
How to Set Up PayPal with RSVPMaker (simplified for 2016)
Advanced Customization (code-level tweaks)
Please post questions to the support forum on WordPress.org.