APArumuga Perumal S Syncfusion Team March 19, 2015 06:50 AM UTC
Thank you for your interest in Syncfusion products.
At this moment our SfRichTextBoxAdv does not provide support to change the style of built-in options pane. Instead we can implement customized find and replace pane for SfRichTextBoxAdv control. For your reference we have attached sample to illustrate the same. Please do find the sample from below link. Please find the attached sample. Try running the sample and let us know if this helps you.