Two buttons are shown in the Insert Facebook Social Plugin footer:
•Insert Social Plugin: this button is enabled when a Social plugin type has been selected. Invocation adds the plugin to landing page content. A plugin is represented by a tag, for example:
({FacebookSocialPlugin;1:FacebookSocialPlugin})
If clicked when one or more validation issues are present, a warning, listing the issues, is displayed at the bottom of the content section.
•Cancel: clicking this button removes the dialog from display without adding a social plugin. An ‘Are You Sure?’ dialog is not displayed prior to closure