For each layout part, you can define the style.
When you have selected a part (body part in this case)
And you have selected the Appearance tab of the Inspector
Then you can determine the fill for that part:
If you have selected Image, then yes, when you click on the layout part background it will ask you, OK which image?
In your case try changing to Solid Color to avoid this.
That did the trick. Thanks so much.