Printing a puzzle book at home.

US Letter is 8.5 by 11 inches and A4 is 210 by 297 millimetres. A4 is a little narrower and a little taller, which is enough to crop a page laid out for the other one. Both files are in the download, so take the one that matches the paper in your tray and ignore the other.

Each is drawn to its own sheet with the margins already set, so the grid, the clue columns and the puzzle number all sit inside the printable area of an ordinary home printer.

The pages are black-and-white vector with no grey fills and no shaded backgrounds. They cost very little ink, and they come out the same on a cheap laser as on an inkjet.

Print dialogs like to shrink a page. Adobe Reader calls it Fit or Shrink oversized pages, macOS Preview calls it Scale to Fit, and most browser print views apply something similar without asking. Any of them takes a grid that was sized for the sheet and prints it smaller, with a wider margin and smaller clue digits than intended.

Set the scale to 100%, or Actual size, or None, depending on which dialog you are in. Leave the orientation on portrait and print single-sided if you want to spread several puzzles out at once.

If a grid still comes out cropped after that, the usual cause is printing the A4 file onto US Letter paper or the other way round. Switch files rather than switching the scale.

The print editions keep the solutions at the back rather than opposite each puzzle, so nothing is spoiled by a page turn and you can print only the puzzles if you want to. The Halloween volume goes further and collects its 50 answers onto five overview pages, which is what keeps that book at 59 sheets instead of 107.

Ordinary 80 gsm copier paper is fine. A softer pencil, HB or B, is easier to erase than a hard one, and a plastic rubber lifts graphite off the grid without smudging into the neighbouring squares.

Print a puzzle twice if you are working with someone else, or print one grid and one blank sheet for working out where a run must sit. The licence is personal use: print as many copies as you like for yourself, your family or your classroom, and do not resell them.