Adjusting splitter size

How do I change the splitter height/width to make it narrower? I updated dhtmlxlayout.css for the selected skin but that didn’t seem to change the size (from 5px to 2px).

/* hor-based splitter */ table.dhtmlxLayoutPolyContainer_dhx_black td.dhtmlxLayoutPolySplitterHor { font-size: 1px; height: 2px; /* 5px; */ line-height: 2px; /* 5px; */ cursor: n-resize; -moz-user-select: none; background-color: #000000; background-image: url("../imgs/dhxlayout_dhx_black/dhxlayout_drag_hor.gif") !important; background-repeat: no-repeat !important; background-position: center center !important; vertical-align: top; } /* hor-based splitter inactive */ table.dhtmlxLayoutPolyContainer_dhx_black td.dhtmlxLayoutPolySplitterHorInactive { font-size: 1px; height: 2px; /* 5px; */ line-height: 2px; /* 5px; */ cursor: default; -moz-user-select: none; background-color: #000000; vertical-align: top; } /* ver-based splitter */ table.dhtmlxLayoutPolyContainer_dhx_black td.dhtmlxLayoutPolySplitterVer { font-size: 2px; width: 2px; /* 5px; */ cursor: w-resize; -moz-user-select: none; background-color: #000000; background-image: url("../imgs/dhxlayout_dhx_black/dhxlayout_drag_ver.gif") !important; background-repeat: no-repeat !important; background-position: 50% center !important; vertical-align: top; } /* ver-based splitter inactive */ table.dhtmlxLayoutPolyContainer_dhx_black td.dhtmlxLayoutPolySplitterVerInactive { font-size: 2px; width: 2px; /* 5px; */ cursor: default; -moz-user-select: none; background-color: #000000; vertical-align: top; }

Hello
Splitter width is hardcoded. There is no native approach to change it.