The Properties button in the Page Actions Toolbar near the top of the page contains information about the page. You must have the page checked out to you to see all the options.
There are two types of reminders available in the CMS that can be set for pages and files. They can be sent to a single user or a group, periodically or on a one-time basis, and to the user’s CMS Inbox only or also to their regular email. You can set reminders only for content you can access and only to yourself or to a group to which you belong. A reminder can be set even if the content is checked out to another user.
Reminders can be accessed from the left menu of the Properties screen or on the Pages List View in the More Actions menu under Edit.