The transactions are separated in 2 types: income and expense. Each transaction must be assigned to a category to allow grouping them in reports. There are provided a set of standard categories, built-in, which are not editable (cannot be modified or deleted). Beside those built-in categories there is allowed for user to define new categories (expense or income); this is available in the "Tools ~ Configuration" dialog, explained later.
Also, it allows the user to define his/her own reports (Report Designer and User Defined Report).
The standard expense categories that can be transactions are presented here:
The standard income categories of the transactions are presented her:
There are multiple views to present your budget, which may contain many accounts. These views are: Money Thread (main one), Evolution Graph, Transactions List, Categories Report, Calendar, Reports Designer and User Defined Reports. They can be selected, for each account, by clicking on the bottom tabs, as it's shown in the below image.