Tnull is used to nullify templates in the monospaced font. It is similar to {{tlx}} in the way that it has support for up to six parameters.
Example
Typing {{tnull|foo|bar|baz|boo}} in the edit-form would yield {{foo|bar|baz|boo}} in the "read-mode".
Note
If there is an "=" in any parameter, you must use parameter number=text. So to nullify something like {{helpme}}, use the syntax {{tnull|click|2=image=IMAGE NAME|3=width=WIDTH|4=height=HEIGHT|5=link=PAGE TO LINK TO}}, which would yield {{click|image=IMAGE NAME|width=WIDTH|height=HEIGHT|link=PAGE TO LINK TO}}
