Asking about what is on your screen

⌘E takes the screen and holds it. A question that needs two screens — the diagram, and the error underneath it — takes two: scroll and press again — there is no fixed limit — and ⌘↩ sends them together as consecutive views of one page.

Each one is captured at the display’s own resolution and aspect ratio, so code that was legible on screen is still legible in the question.