I understand that in Excel, you have the option to right-click and add a note to a cell.
For a long time, OpenOffice.org didn't have that option. You could choose Insert > Note, or you could add that function to a keyboard shortcut to avoid using the mouse. However, many people were used to the right-click.
Well, it's here. In 2.2 and possibly earlier versions, you can right-click in a cell and get the note option.
A box will appear; type the note. The display, while you're typing, is kind of twitchy. However, the whole thing does get entered correctly.
When you move your mouse over the cell (you don't have to select the cell), the note displays.
Right-click on the cell to choose to delete or make other choices re the note.
To print notes, choose Format > Page, Sheet tab, and in the Print section in the middle, select Notes.
The notes are printed after the relevant sheet, with a cell reference.