Start with the right page.
Open your activity and choose Print / save PDF. The print view opens in a separate tab with a button at the top. Choose US Letter, portrait orientation, and a scale of 100% or Fit to printable area. If the edge of the design disappears in the preview, use Fit rather than increasing the scale. Turn off browser headers and footers if you do not want a date and web address on the page.
A test page saves a lot of fuss.
Print one page before sending a whole bingo pack to the printer. Ordinary copy paper works well for puzzles. For cards that will be handled repeatedly, try heavier paper if your printer supports it. Check the paper setting against the stock you loaded, and avoid forcing thick card through a printer that is not designed for it.
Save it for another day.
Choose Save as PDF in the printer destination menu to keep a digital copy. Download PDF creates a complete PDF without opening the print dialog. Our Save image button downloads an SVG, which keeps lines and letters sharp when resized. For an A4 printer, use the A4 setting with Fit to page and check the preview before printing. Store the answer key separately from the puzzle so the surprise lasts a little longer.