# A question about the tabbing environment

On page 122 of Gratzer's book More Math into LaTeX, he says that

The tabbing environment has to be typeset with typewriter style font.

And on page 123 of that book, he says that

You do not really have to use typewriter style font—just beware of the pitfalls.

My question is what can happen if I do not use the typewriter style font to typeset the tabbing environment? What does the pitfalls mean?

• Apart from the fact that almost nobody uses the `tabbing` environment anymore, i guess this is just authors humour. – Johannes_B Aug 20 '17 at 11:18
• Welcome to TeX.SX! – Bobyandbob Aug 20 '17 at 11:34
• the whole point of tabbing (which isn't a very useful environment) is to specify alignment points which are not needed if you use a monospace font where everything is aligned naturally. So certainly tabbing if it is used at all is usually not used with a typewriter style font. – David Carlisle Aug 20 '17 at 16:37