Image Advice
In the Playback Menu (page 67), when you select Image Advice, the camera analyzes the image for focus, exposure, and so forth.
If Image Advice identifies improvements that can be made for similar images taken in the future, an analysis appears on the Image Display listing the issue and recommended solutions, as shown in the example screen here. Image Advice lists up to two issues.
To exit the Image Advice screen, press the 
button. NOTE: Image Advice is not available for video clips.
72 HP Photosmart M22/M23 User’s Manual