When making a note about an opportunity you can add an additional image to that note as well as an additional note to the image.
An image can be added to the note by simply:
1. Click on the opportunity that you want to make a note about
2. Click on the 'Note' section
3. Click the Camera icon in order to activate the camera
4. Take a picture and click the checkmark/use photo on your phone in order to add the image to the note
5. You have now added an image to the note
6. Under the addi image you can add an additional note belonging to this image.