TreeGrid Style

How do we customize the styles of tree grid’s header and a cell’s style in the tree-grid? I could not find any documentation on this. I am looking to change background color, font, font sizes etc…

You may try to use the setStyle() method:
docs.dhtmlx.com/api__link__dhtml … style.html
Also you may use the online skin builder to create a custom skin with the required look:
dhtmlx.com/docs/products/skinBuilder/

Thank you sematik.