Toolbar - Select Button only Show Icon

How to show only selected Icon in toolbar selectbutton?
Dropdown list must show the texts against each option but on select icon in toolbar should change and text should remain hidden.

Unfortunately such feature is not supported and cannot be achieved with the public API.

I achieved it like:

div.dhx_toolbar_btn div.dhxtoolbar_text { display: none; }
div.dhx_toolbar_poly_dhx_skyblue td.td_btn_img img.btn_sel_img { margin: 3px 0px -3px 0px; }