[Groff] [mom] switching to 2 colums mode

[Bertrand Garrigues]

Hi,

I would like to switch to 2 colums mode at the end of a document. More 
precisely, I'm trying to write a simple style file for makeindex to 
generate an index. Previously with ms package I used .2C.

But with mom it seems that using the COLUMS macro is only possible if 
you want to apply it to the whole document, as it must be defined before 
.START.

How can I switch in 2 colums mode after the .START macro ?

Regards,

Bertrand Garrigues