Hello,
In custom emails (when enable by option) you can write the text you want!
Don't forget to enter subject and body, the 2 are needed by Joomla mail system to be send.
And in your text, you can use tags (list of available tags at the top of custom emails fields) to get some data value (name, email...)
You can to style the mail, but it seems that your editor is disable in global config (so to be check if you want to add styling to your test, or insert images, easier than to write html code).
Hope this helps ?
Regards,
Cyril
Note: the free forum is an open community where every user could help each other (or find answers by using the search) and i do my best to come here every week to answer users (i'm the developer of iCagenda so it helps to give answers
) for free, but i can't come here every day (i'm very busy with development, and to work on many great things for iCagenda!). So for a priority support (check every 24h), there is an advantage of the pro version