The red arrow ( ) in the lower right corner toggles between the Command Line and the Command Editor.
The Command Line supports auto-completion using the
Tab key. For example, typing 'w' followed by
Tab completes it into 'window'. Cycling through the possible completions is done with the arrow keys. Since Firebug 1.6 there's also an popup with suggestions shown for the entered part of a command, unless disabled in the Console options.
eval() on it and passing back the result.
The Command Line also supports the Command Line API, a set of special purpose commands.
 Command Line Popup
To support you analyzing elements and writing code the Command Line integrates an auto-completion for the commands you are typing. Therefore after starting to type a command you simply have to press
Tab and Firebug is completing the command. It is also possible to complete a value with
Enter or the
→ arrow key or by clicking an item inside the Completion List Popup. If there are several commands starting with the same phrase like "getElem" you can use the
↓ arrow keys before pressing
Tab to alphabetically switch through all available commands. Also the global variables, which you defined in your script, are used.
Furthermore the auto-completion is case-insensitive, which allows for rapid typing. E.g. entering "document.gete" offers "document.getElementById", "document.getElementsByClassName", "document.getElementsByName", "document.getElementsByTagName" and "document.getElementsByTagNameNS".
 Shortcuts for inspected elements
The Command Line offers you the possibility to easily access elements inside the DOM similar to the sizzle selector library integrated in the jQuery Framework via the
There are different commands available providing a wide variaty of functionality. For a detailed description of the these commands see the Command Line API.
 Inspect object in another panel
How you inspect elements using the console is described above. Besides that it's also possible to inspect them in the most appropriate panel by hitting
Enter instead of just
Enter. The console output also often contains links to other panels like the DOM Panel.
 Command History
 Smart code pasting
When you paste a multi-line script to the Command Line it automatically switches to the Command Editor, so that the line breaks are preserved and you can edit your script as you would do inside an editor.