What this covers
This tutorial walks through everything that happens at the booth between "first customer of the day" and "last sale before teardown." The basic ring-an-item flow comes first (you can stop there if your sales are simple). The next two steps cover the features that matter once your booth gets busier: haggling, tipping, customer step-aways, the occasional mistake.
Custom orders with deposits, multi-device booth setups, end-of-event inventory posting, and the post-event reports all have (or will have) their own tutorials. The "what's next" links at the end of Step 3 point at the relevant ones.
All three steps
Add-on for Square users
If you take card payments through Square, there's an integrated path that hands the sale straight to your Square app. Total pre-filled, sale records itself when Square hands you back. Strictly optional and not needed if you don't use Square.
Add-on for two-person booths
If you work the booth with a helper on a second device, you can pass a cart between you with a 4-digit code. Useful when the helper hits a question and wants to bring you in mid-sale without restarting.
Add-on for Venmo users
If you take Venmo, the app can show your Venmo QR code on screen for the customer to scan. Saves them typing your handle.
Turn it on: open Settings → Payments in the app, paste your Venmo handle into the Venmo username field (no @, just the username — e.g. WoodenDoodle), and tap Save. (Canonical key: VENMO_USERNAME.)
Use it at the booth: a 📲 Show Venmo QR for the customer link appears below the Cash/Card/Venmo row whenever Venmo is one of your payment methods. Tap it. The customer scans the QR, Venmo opens on their phone to your profile, they send the amount. You pick Venmo as the payment method and tap Complete Sale once they confirm.