# TwinePOS Docs > Guides for merchants and partners using TwinePOS, plus weekly release notes. - [Welcome to TwinePOS](https://docs.twinepos.com/index.md): Guides for running your shop with TwinePOS. - [Open a till session](https://docs.twinepos.com/merchants/till/open-a-session.md): Count your opening float and start selling. - [Close the till and cash up](https://docs.twinepos.com/merchants/till/close-and-cash-up.md): Count the till, prepare your bank deposit and close the day. - [X and Z reports](https://docs.twinepos.com/merchants/till/x-and-z-reports.md): Check sales during the day or print your end-of-day totals. - [Change the payment method on a closed order](https://docs.twinepos.com/merchants/selling/change-payment-method.md): Fix an order that was paid with the wrong payment method. - [Catalogue and inventory](https://docs.twinepos.com/merchants/catalogue/overview.md): Set up your products, prices and stock. - [Reports](https://docs.twinepos.com/merchants/reports/overview.md): Understand your sales, payments and cash. - [Partner guide](https://docs.twinepos.com/partners/index.md): Resources for TwinePOS resellers, installers and integration partners. - [What's new in TwinePOS](https://docs.twinepos.com/changelog.md): Weekly release notes for merchants and partners.