You can use
Change the formatting for all text in a sticky note including font style, size, alignment, and list style.
Add more items to a bulleted, numbered, or dashed list—just press Return at the end of a list item in a sticky note. You can also increase (or decrease) the list level when you click a line in the list, then press Tab to indent (or Shift-Tab to go back).
To apply formatting to specific text in a sticky note, select the text, then use the formatting buttons for the item.
You can use connector lines between a sticky note and other items. If necessary, click the Show Connectors button other files.