Image Size (Still Image) - Sony DSC-WX220 Instructions For Use Manual

You can change the display contents on the screen.
1. Press the DISP (Display Setting) button.
Each time you press the DISP button, the recording information display changes as
follows: Display All Info. → No Disp. Info. → Histogram → Display All Info.
Display All Info.
No Disp. Info.
Histogram
Note
Histogram is not displayed during panorama shooting.
[26] How to Use

Image Size (still image)

The larger the image size, the more detail will be reproduced when the image is printed on
large-format paper. The smaller the image size, the more images can be recorded.
Using shooting functions Selecting still image size/image quality