Inventor does not have a specific area of the user interface that is an exact parallel to the command line in AutoCAD. Inventor does provide a means of accessing product functionality through keyboard shortcuts and command aliases.
Like most Microsoft Windows-based products, Inventor provides keyboard access to menus and command functions. These shortcuts are indicated on menus with underlined or with a letter within brackets while a command tooltip is displayed
User-defined command aliases provide a command line-like ability without an area of the interface being dedicated to command entry. Type a command alias at any time the command is valid. Inventor provides a list of possible commands that match the letters you type (until the command is unique or until you select from the list). A set of predefined command aliases is delivered with Inventor and you can extend them with aliases more suited to your particular workflow needs.