The Expense/income types tab contains the list of categorized expense types. Expense type may be specified in the Expense document. Then, you may get a chart of expenses for any period of time.
When you create an expense/income type, in addition to its name, you can optionally check Non-accountable box, which allows to exclude an expense/income type from the Ledger. This means that you can register some amount as an expense or income, but it won't be registered and displayed in expense/income charts.
To manage categories, select Manage expense categories.
To move selected expense type(s) to a specified category, select Move to category button and select a category.
This list contains few predefined entries: Bank charges, Translation income, Translation expense, Currency difference. It is not possible to delete these entries, but it is possible to rename or move them to another category. These predefined entries are needed to make corresponding transactions in the Balance sheet and Ledger when creating different documents. When creating a new job, a corresponding record must be added to the Ledger, showing amount of the job as income from translation.