Command Tool can be used as a Text Editor window at any time. The advantage to this is that you do not need to know a command line editor such as vi. To enable the Command Tool text editing window, move the pointer onto the window pane, press the MENU button, drag the pointer down to highlight File Editor, and then to the right to highlight Enable. The Command Tool pane splits in two; the top pane remains as Command Tool, while the bottom pane becomes a Text Editor.
See the "Text Editor" section for an introduction to the commands in the Command Tool File Editor.
To return to the basic Command Tool, position the pointer in the top pane and choose File Editor -> Disable.