Hi Peter, To add a item to an invocie or estimation click the add button. As you clcik add the previous item is saved and you get a new item. The current patient is maintained so you don't need to select it again but you can have mutiple patients on an invoice. For each product just click on product selector button and enter part or full name (as with clients etc) and it will list the closest matches i.e amox, anae etc Flow is not ideal yet but we will work on it. Also if you click add and don't fill in the details the current release adds a invoice item with a blank , zero product which should not be allowed. Hope this helps. Tony