This Settings Editor dialog page allows you to edit a tab completion word.
The Word field contains the tab-completion word. These words are automatically expanded on the command line if you enter the first few unique characters and then press the <TAB> key.
A second type of tab completion is used with the Shift-<TAB> key. The last word larger than the Tab Limit (in the Preferences) that was last displayed in the output window that starts with the last character in the command line is recalled into the command line. For example, if someone with a really complicated name such as Xenafragilicious talks to you, you can enter the X character into the command line and press Shift-<TAB> to recall the entire word. You do not need to store words in the settings editor for dynamic tab completion...it is performed automatically.