Output View
It is the quickest way to see what each output is actually sending — useful when the projectors are elsewhere, or when checking that content landed on the output you expected.
This window costs real GPU time: every routed output is rendered twice while it is open — once for the output itself, once for the preview. Close it during a show, and when judging performance.
Preview resolution
Each preview is rendered at the size the window gives it, keeping the output's aspect ratio, and never above the output's own resolution. Making the window smaller therefore lowers the cost; making it larger raises it, up to the real output size.
Because the preview is scaled down, it shows framing, routing and content — not pixel-level detail. Judge sharpness, banding or blend seams on the real output.
Common Mistakes
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Frame rate drops during a show — the output view is open. Everything routed is being rendered twice.
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An output is missing from the window — only routed outputs appear. An output with nothing routed to it has no image to preview.
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Judging image quality from the preview — it is a scaled-down copy. Blend seams and banding have to be assessed on the output itself.
Related
Outputs — the outputs previewed here
Video Routing Window — what makes an output appear in this window
Performance Overview — measuring the cost this window adds