The following example sets wrap on and then changes the left margin and displays text:

savewrap=_wrap // save last wrap setting
_wrap=true // must be true for alignment
savelmargin=_lmargin // save last alignment setting
_lmargin=5
savermargin=_rmargin // save last alignment setting
_rmargin=20
? "New York, Chicago and Boston are cold in wintertime."
// Now the text wraps around between columns 5 and 20
_rmargin=savermargin // restore the previous margin
_lmargin=savelmargin // restore the previous margin
_wrap=savewrap // reset wrap