Question - How do I find a screen that shows me all the gaps and/or N Codes in the Register?
Answer - You can see the N codes and Gaps in the Register by going to Reporting>Reports>Attendance Tab and then use the Gaps in Register by Date report. You can then toggle between N Codes and Gaps. Click on red and clue circles in here to rectify the register.
Another report for N codes is the Unauthorised Absence report in Reporting>Reports>Attendance and tick "Only Show Unknown Absences" in here and click the dates you fix the register. Another for Gaps is the Gaps in register by student report, again click the dates in here to fix the register.