There are a few buttons arrayed horizontally above the main drawing window, along with the coordinates display. These are associated with the layer table and selection control. The controls in this menu are described in 3.8.
The drop-down menus arrayed along the top of the main window control additional features.
In addition, there are a number of special `!' commands that are entered by typing the command name. These control or enable additional features that are not as frequently used.
Finally, there is a rather sophisticated scripting interface with a large collection of built-in functions, which enables the user to create automation scripts. These scripts can be initiated from the User Menu.