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Preview has some rudimentary editing functions. The Photos app has some more advanced functions. With extensions support, you can get some add-ons for Photos that can enhance those capabilities.
 
Preview has some rudimentary editing functions. The Photos app has some more advanced functions. With extensions support, you can get some add-ons for Photos that can enhance those capabilities.
Thank you. I will let him know your suggestions.
 
A little more advanced option would be Affinity Photo ($50 in the App Store). It's similar to adobe photoshop in its capabilities but is much cheaper. However, I would check out the photos app first before investing in a more high end software.
 
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