https://shopify.dev/docs/apps/build/pos/tutorials/build-print-extension
Build a print UI extension
Learn how to build a POS print UI extension that generates, previews, and prints custom documents.
ui extensionbuildprint
https://shopify.dev/changelog/ensuring-pos-ui-extension-stability-by-hardening-callback-handling
Ensuring POS UI extension stability by hardening callback handling - Shopify developer changelog
Shopify’s developer changelog documents all changes to Shopify’s platform. Find the latest news and learn about new platform opportunities.
pos uiensuringextension
https://shopify.dev/docs/apps/build/pos/tutorials/build-subscription-extension?extension=polaris
Build a subscription UI extension
Learn how to develop a scaffolded POS UI extension into a simple subscription UI extension.
ui extensionbuildsubscription
https://shopify.dev/docs/apps/build/pos/tutorials/build-discount-extension
Build a discount UI extension
Learn how to develop a scaffolded POS UI extension into a simple discount UI extension.
ui extensionbuilddiscount