Is there a -w equivalent for isql when already connected?

The default output (text) width in sybase isql is 80. It can be changed with the -w flag when isql is started on a command line: isql -w 200 -S... -U... -P... Now, I am wondering if there is a possibility to change the text width when I am already connected. I would have expected something like 1> set columnwidth 200 2> go or something similar. Yet, in the documentation I am unable to find something in this direction. So, does that mean that this is impossible or am I looking in the wrong place?