Arena poster

Every phone scans this poster first: it's how they agree where the arena is. One A4 print works for every game and every venue.

PDF · A4 landscape · black and white · 0.5 MB

Print and hang it

Print at 100% on A4. In the print settings choose Actual size or 100%, not "Fit to page". The artwork should measure 27 cm across: phones judge distance from its size.
Plain or matte paper. Black and white is fine. Skip glossy paper and draft or toner-saving modes: a faint or shiny print is harder to find.
Put it at the halfway point. In the built-in Practice Hall the poster marks the middle of the arena: lay it flat on a table in the middle of the room, or tape it flat to a side wall at the halfway line, at about chest height. As you read it, BLUE's base is to your left and RED's to your right. Arenas set up at a venue need it exactly where it was during setup. Leave it up for the whole session. Laminate it to reuse it: the same poster works for every game and venue.

The organiser console's SHOW MARKER turns a TV or laptop into the poster, at its real size.

In a match lobby, tap POSTER → SHOW MARKER, or open console.arblast.io/marker.html on the screen you'll use (no sign-in needed).
The first time on each screen, hold a bank card against it and drag the slider until the outline matches the card. That's how it knows how big the screen is.
The screen needs room for 28 × 19 cm: a TV, or a 14-inch laptop or bigger. Phones and small laptops are too small, so print the poster instead.
Turn the brightness up, avoid reflections, and keep the screen still: it is the arena's origin, so don't move it during a game.

Tape one near each team's base, facing where players gather. They help phones stay lined up in bigger arenas set up with the app.

Phones not finding the poster? See common problems.