Hi Miki Watts,
Please refer the sample below which illustrates the customized CSS skins applied for GridGroupingControl using version 4.4.0.51 . The Appearance property allows you to set custom skins for the control to enhance its look.
http://websamples.syncfusion.com/samples/Grid.Web/4.4.0.51/F79492_CustomCSS/main.htmWe would suggest you to upgrade to our latest version of Essential Studio 7.1.0.21 which offers more enhanced controls and features and you can download this build from,
http://www.syncfusion.com/downloads/latestversion/default.aspxFor more details, please refer what's new in Essential Studio 2009 Vol.1 – ASP.NET UI products from below link.
http://www.syncfusion.com/products/whatsnew/aspwhatsnew.aspxPlease let us know this sample helps you.
Thanks,
Rekha