Drag circles to adjust vanishing points. Drag grid to pan, use scroll wheel or pinch to zoom.
Hide the controls, take a screenshot to clipboard OR click the camera icon to generate a full resolution imageSCREENSHOT: Ctrl+Shift+Cmd+4 (MAC) Windows+Shift+S (WIN) will give you crosshairs. Make a selection and it will be captured to the clipboard. Paste into your drawing document Cmd+V (MAC) Ctrl+V (WIN)
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Right-click to copy to clipboard (iOS: Split screen and drag into document)