The following edits are PNG image optimizations to reduce file size. The goal is to reduce bandwidth needs, especially for high-traffic images.
zopflipng --lossy_8bit --lossy_transparent -m in.png out.png
zopflipng --lossy_8bit --lossy_transparent -m in.png out.png
zopflipng --lossy_8bit --lossy_transparent -m in.png out.png
zopflipng --lossy_8bit --lossy_transparent -m in.png out.png
zopflipng --lossy_8bit -m in.png out.png
zopflipng --lossy_8bit --lossy_transparent -m in.png out.png
zopflipng --lossy_8bit --lossy_transparent -m in.png out.png
zopflipng --lossy_8bit --lossy_transparent -m in.png out.png