There are 3 types of documents:
You can add item to document simply selecting it from Goods catalog or scanning item's barcode.
In addition, application provides "batch scan" mode. In this mode you continuously scan items' barcodes and these items are added to document in background. Quantity is increased by 1 with each scan or, alternatively, after each scan you enter item's quantity manually in the input field - you can choose from these options in "Settings".
When you add item to document and there is no such item in Goods catalog, it will be added there automatically, if you entered full info about the product. But, it is impossible to add item to Outgoing document if there is no such item in Goods catalog, since we can't ship goods which are out of stock.
To delete document or document's line use long press (to show popup menu) or just swipe it.
Deletion obviously leads to changes in quantities in stock. Inventory documents can be deleted only in case if it is the last document, because deletion of any previous Inventory documents could result in erroneous data about quantities in stock.
If you wish to save documents to file, send them to e-mail or Dropbox account you can do it in one of two ways. First, long press the document to call popup menu. Second, use multiple selection mode: press "Plus" floating button and select "Select documents" menu item. Now you can mark needed documents and use buttons in the bottom menu to perform needed actions with documents.
Use top toolbar buttons to filter and sort documents in the list.