Adding notes to matrix rows To add a textual explanation about the conditions or the distribution on a specific row, you can add a note. In the Note column, hover over the empty cell to see the Note icon. Click the Note icon to open the Note editor overlay. Specify a note text. To close the overlay, click the Note icon again or click outside the overlay. The Note icon remains visible for rows for which a note is added. You can click the Note icon again to see the note text and to edit it later.