The Add Definition command allows you to add multiple margin notes within one paragraph.
1. Place your cursor anywhere in the paragraph you want to annotate.
2. Click the Margin Note button on the Doc-To-Help toolbar.
3. Select Add Definition from the drop-down menu.
Doc-To-Help splits the margin note column adding an additional cell to the left column of the margin note table.
4. Type the margin note in the new cell.
Alternatively, you can perform the same steps with the Edit|Margin Note menu command.