Rather than images of objects, consider using images that show people and activity.  This offers opportunities for richer communication and provides more contextual information.

1. Select the Settings button in the Toolbar. 

2. Select Page Browser.

3. Select the page you're editing and choose Editor.

4.  Select the topic picture you want to change.
 

Moving Hotspots to Accommodate the New Topic Image

1.  Select the hotspot to move.

2.  Select the center of the hotspot and drag it to its new location.
 

Change the Thumbnail in the Navigation Bar

1.  Select Levelsfrom the Navigation Bar.

2.  Select Topics.

3. Select the Select Topics from Library button.
  5.  Select Change Thumbnail.
 
6.  Select your image.

7.  Select the green Select button at the top right corner of the screen.

8.  Select Save. 

9.  Select Back. 

10. Select Save.