Added in 1.9.6
/nickcolumn [-rw] [window] <N>
Changes nick column settings for a window.
If no window is defined, current window is used.
Switches
-r - Reset nick column divider to non expanded value.
-w - Set new custom nick column width.
Parameters
[window] - Window to edit.
<N> - The number of pixels to set the nick column divider to.