You can move the note icon by clicking on the selection tool (its looks like a square with dotted corners) and then clicking and dragging the icon to the area of your liking.

You can move the note icon by clicking on the Text Selection tool or the Rectangular Selection tool (it looks like a square with dotted corners) and then clicking and dragging the icon to the area of your liking.

Make sure that you aren't in highlighting mode (click off the highlight tool at the top of the page) - you can't move the note around when you're highlighting.