Hi Odysseyinc,
Thanks for using Syncfusion Products.
We have attached a simple sample based on your requirement. In the sample we have customized the template of 'ToolBarAdv' in 'App.xaml' using Style.
Please let us know in case of any other queries, as always we are happy to help you.
Regards,
Dinesh Kumar P
ToolBarAdv_TemplateTest_4fa692d7.zip