The window looks empty. Is it?
A tool window shows nothing, yet the process behind it is clearly running. A screenshot only says it is blank. A capture says what macOS actually exposes: if the tree lists the rows, labels and buttons, the interface was built and simply is not drawn, which is a rendering bug. If the tree is empty too, the data never arrived. One capture, and your agent knows which half of the problem to look at.
Suggested by a customer who spent an afternoon on exactly this in Xcode’s device window.
Which button did you mean?
You ask the agent to rename a button or fix its action. From a screenshot it guesses. With ContextClip it gets the control’s role, title and identifier, plus the buttons next to it in the same toolbar, so it searches your code for that identifier instead of inventing a new control.
Eight points off
A layout looks wrong but you cannot say by how much. Draw a rectangle over the area with ⌃⌥R: the agent receives the exact on-screen frame of every control you boxed and compares them with your constraints or padding values. Numbers, not impressions.
Why is this control disabled?
A checkbox is greyed out, a field will not take focus. The capture carries the enabled, focused and value state of every control, so the agent sees the state the app is really in, not the state you think it is in, and can trace which condition in the code produced it.
Show only what you mean
You do not want to hand your whole project or screen to a chat. Box one dialog with ⌃⌥R: the picture is cropped and the tree keeps only the controls inside the rectangle. Paste it into Claude Code, Cursor, Codex or ChatGPT Classic. ContextClip uploads nothing by itself; you decide what goes into which chat.
Ask about any app
You are stuck in an app you did not write: where is the setting, why is this option greyed out? Point at the window and paste it into your AI chat. The chat sees the window’s actual settings, switches and their states instead of guessing from pixels, and can tell you which one to change.
A bug report the developer understands the first time
You test an app, design it or manage it, and something on screen is wrong. Instead of “the second button on the right”, the capture carries the control’s exact name, role, state and position next to the screenshot. Paste it into the ticket or the chat with the developer, and nobody has to ask which button you meant.