The red and green regions you are seeing are actually exposure warnings. The red regions are areas of the picture that are over-exposed. The green regions are areas of the picture that are under-exposed. These colours are not permanently on your pictures. You may want to deactivate the auto-exposure warnings as follows:

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  View mode:
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• Click View menu.
• You should see a checkmark next to Exposure Warning. To deactivate the exposure warning, simply click Exposure Warning to uncheck.
  
  Edit mode
   

• Click the Exposure Warning icon to turn the warning on and off. It is the first icon on the toolbar, an exclamation mark in a square.
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