Sources
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Barcodes per label
Each 2"×4" label is split into a 2×2 grid of four kennels.
Order (within each source)
Skip used labels
Start printing after this many already-peeled labels on a partly-used sheet.
Barcode rendering
Regenerated as sharp Code 128 from the scanned value. Switch to “Original” to reuse the exact image from the PDF.
Printer calibration nudge
Shift everything if your printer prints slightly off the labels. + moves right / down.