Most of the notes or policies within the accounts are generated based on a nominal code posting and the disclosure level that is set.
To confirm what notes and / or policies should be appearing, or what triggers them, if you open the accounting period and choose Help / Conditional subformats it will list the note or policy and detail what generates it.
If you want to add you own notes or policies this can be done by going to disclosure formatting and then add new note or add new accounting policy. Adding notes will give you the option to generate a free flowing text note or a tabular note. Any new notes or policies added will appear as the last policy and / or note. You can change the order by going to edit / subformat ordering and then changing where you want them to appear in the list.