How to send a reminder manually?

If you have set a loan period for lending books, you can send a reminder to the reader after it expires.
Setting the return time:
In the Library module, select "Settings" in the top menu.

In the "Return period" section, click edit and enter the number of days.

Select the "Borrowed books" tab in the top menu.
In the last column on the right, you have the option to send a reminder if the book is borrowed longer than the specified return period.

Click "Send reminder".

Done. The reminder has been sent.

Note: Automatic reminders after the return period will be available later.