Allocate the stock, pick it, then ship. Shipping creates the invoice.
Make sure the order is out of draft: a draft order's dispatches are not on the Workflow board and cannot change status, so Email, Download or Print the order first. Then, on the order page or the Workflow board, change the dispatch status from Order Review to an allocated status such as Picking. Omono reserves the stock.
Open the sales order and click the picking icon on the dispatch to open the Dispatch BOM / Picking form.
Enter the quantity picked for each line, or click Add All to pick as much as stock allows. The box shows as invalid if you type more than is available or more than the dispatch needs.
Click the tick to save. If you close the form with the cross instead, your picks since opening it go back to stock.
Change the dispatch status to Shipped. The Good Job! form opens. Enter or check the Courier and Tracking #, then answer Mark SO-1234-1 for [customer] as Shipped? with Yes.
You can only ship a dispatch once it is fully picked; Shipped is greyed out until then. Before the form asks, Omono runs three checks: Tasks Blocking Shipping, On Stop and Proforma Awaiting Payment. If Perform Pre-Shipping Credit Limit Check is on in the Xero settings, it also checks the customer's credit limit in Xero, which can block the shipment. Shipping creates the invoice, releases stock allocated but not picked, and moves the order to Complete once every line has shipped.
For assemblies, the picking list PDF, the shipping checks, on hold and shipping by mistake, see The Workflow board.