Examples
Every board here was drawn in Drawdy for the job its title names, with real data on it. Open one in the share viewer, present it frame by frame, or copy it to your device and change anything. Where a board belongs to a use case, the card links to that page.
All 20 boards below, grouped by trade.
Service diagrams and review decks with the numbers on them.
For backend engineers
The order and payment path of a mobile app at 1,200 checkouts a minute: the request path in blue, PCI scope boxed off, idempotency keys, Postgres and the Stripe tokenizer. Reviewer notes and walk-through steps sit on the diagram itself.
Reviewed
For platform teams
A nine-frame review deck where each frame is a slide: current state, what hurts, an async Kafka proposal, a three-phase migration behind a flag, risks, and the ask of two engineers for five weeks. Present mode walks it in order.
Reviewed
Screens to argue about and a brainstorm that ended in decisions.
For product designers
Low-fidelity screens from sign-in to naming a first board, with the happy path in lime, error states in red and analytics events marked where they fire. Rough on purpose, so the review stays on the flow.
Reviewed
For product teams
A 45-minute session with six people and four pens: cohort retention data on the left, the idea dump in the middle, lassoed clusters and How-might-we questions on the right. The facilitator's notes stay on the board.
Reviewed
Lessons drawn to be walked through, with the answers hidden until asked.
For grade 5 teachers
One 40-minute lesson: evaporation, transpiration, precipitation, runoff and groundwater drawn as a loop, with the sun's heat in orange, vocabulary in violet and answers hidden until the class has guessed. Real volumes in cubic kilometres a year.
Reviewed
For geography teachers
Both world maps drawn from the same Natural Earth outlines at the same scale, so a class can see where Mercator inflates area and where Equal Earth stretches shape. A third frame summarises UN resolution A/80/L.104 of 4 September 2026.
Reviewed
A game plan on a scaled pitch and a full match in six frames.
For football coaches
The starting eleven with a role for each shirt number, the build-up shape on a scaled pitch, set-piece routines step by step, a substitution timeline and if-then plans for going long or protecting a lead. Drawn at one metre to four units.
Reviewed
For football analysts
Six frames for one Premier League match on 6 September 2026: lineups and formations, all three goals drawn on the pitch, a timeline with substitutions and the VAR call, stats, the table and records. Present mode walks the frames in order.
Reviewed
A race strategy chart and forty circuits traced at true scale.
For race strategists
A strategy chart of the 53-lap race at Monza: every stint by tyre compound, the lap-2 red flag, the virtual safety car on laps 27 to 29, the gap to Russell lap by lap and 26 overtakes. Circuit facts and sector boundaries in the margin.
Reviewed
For motorsport fans
All 40 circuits in the dataset traced from OpenStreetMap geometry, north up at one unit to 3.6 metres: the 23 rounds of the 2026 calendar as a card each, the two venues dropped from it, and 15 historic tracks at half scale. Each card gives lap length, race distance, footprint, straightest run, tightest radius, altitude and pole where the round has been run, and the summary frames overlay all 23 laps on one origin, rank every trace by length and table the season round by round.
Reviewed
Two live network maps, one built and one redrawn to the official schematic.
For transit planners
Ten lines and 192 stations in an octilinear layout, solid where in service and faded where still under construction, with the Chao Phraya, both airports and every interchange named. Zoom in and each station label is its own element.
Reviewed
For transit planners
Thirteen subway lines as a schematic in the style of the official Tokyo Subway Route Map, with station-number pills, boxed interchanges, the JR Yamanote loop in grey and the Keikyū and Tokyo Monorail links to Haneda in teal. Three side frames put the lines at a glance, the through services beyond the subway, and the facts, fares and history next to the map.
Reviewed
A site plan, a lighting plot, a circuit board and a contour sheet, each element draggable.
For architects
Level 0 and landscape at 1:200: setbacks, a permeable driveway, the 12 by 4 metre pool, pergola, orchard and a protected oak, plus the rooftop PV array. Client comments for revision C sit beside the plan with what blocks sign-off.
Reviewed
For lighting designers
Plan view of the rig: five electrics with trim heights, 44 Source Four profiles, 14 Fresnels, six moving heads and eight LED cyc battens, each symbol carrying its channel number and gel colour. The set pieces are on the same plot.
Reviewed
For electronics engineers
A 36 by 36 millimetre four-layer flight controller around an STM32H743: top copper in red, bottom in blue, gold pads, vias and white silkscreen, every pin and trace its own element. Layer stack-up and BOM highlights beside the board.
Reviewed
For cartographers
Mount Fuji as a risograph sheet: 60 stacked contour bands at a 50 m interval, an index contour every 250 m, and five inks that cycle every 500 m of relief rather than ranking it. A second panel carries the survey figures the poster leaves out, from the 780 m crater rim to the four fifth-station trailheads.
Reviewed
Two famous games on three boards: a diagram per move, both clocks, and one that plays itself.
For chess coaches
The PogChamps 2020 round-two game, twelve half-moves in 76 seconds, with a diagram per move, both clocks, and annotations marking the loose move and the blunder that opened f2. Walk it frame by frame.
Reviewed
For chess coaches
Donald Byrne against a 13-year-old Bobby Fischer, New York, 17 October 1956: the Grünfeld opening, 17...Be6!! leaving the queen en prise, the windmill knight tour and 41...Rc2 mate, each on its own diagram. All 41 move pairs, the closing material ledger and the sources are on the board, down to Kmoch naming the game in Chess Review, December 1956.
Reviewed
For chess coaches
The Game of the Century as three boards that play themselves, one act each at 800 ms a move, then rewind: the Grünfeld and the knight raid, the queen sacrifice and the windmill, then two bishops and the mating net. Every still board is that act's opening position, so a pause or an export is always a real position, and captured pieces fade as they go.
Reviewed
Fifty-eight penguins and eleven keepers, every relationship on one sheet.
For aquarium keepers
Sumida Aquarium's own poster redrawn as a network: 58 Magellanic penguins and 11 keepers as of late October 2025, with marriages in red, break-ups in navy, more-than-friends in purple, friendships in orange and bad blood in teal. Six named cliques, the 2025 hatchlings and every wingband colour are on it; it follows the aquarium's official English chart, a registered trademark of ORIX Real Estate Corporation.
Reviewed
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