# Limit to one child

The **-1** switch (that’s the numeral _one_, not the letter _ell_) effectively cancels out most of the point of PolyShell by limiting the number of child sessions to one. Why would anyone want to do such a silly thing? One not-too-farfetched reason might be that you like the way PolyShell intercepts SEND.LIT messages without overwriting the current screen comments, but you don’t want certain single-tasking users to get confused by launching more than one session.