The image shows an empty or barely visible diagram of what appears to be some kind of device interface with the title "How programmers comment their code".
It's the perfect representation of that code you inherited with exactly zero helpful comments. You know, the 10,000-line monstrosity where the only comment is // TODO: fix this later
from 2014. Or my personal favorite: /* Don't touch this. I don't know why it works. */
After 15 years in the industry, I've accepted that comprehensive documentation is like unicorns—everyone talks about them, but nobody's actually seen one in production.