✅ – Sharp enough to zoom in on a chisel bevel angle. ✅ Searchable text (Clear OCR) – Type "rebate plane" and land exactly on page 47. ✅ Bookmarked chapters – One-click navigation from "Through Mortise" to "Lapped Dovetail." ✅ Original page size – Scanned at 100% scale, not reduced to fit a screen. ✅ Greyscale or bitonal (not color) – The original was printed in black ink on off-white paper; color scans add unnecessary file bloat.