Many areas of ReplyManager allow Users to filter or view the page so that it can be configured to the individuals' preference.
SysNotes Filter is one of those areas and can be found at the top of the email list page. System Notes (SysNotes) are notes generated by the ReplyManager system (e.g. when a user reads an email, closes it, etc.). Because these are sometimes not integral to an emails thread, a filter has been provided so that users can choose to view them or not.
To hide all SysNotes associated with the folder mark the checkbox next to Hide SysNotes. To show all SysNotes, uncheck the checkbox.