Hi Steve,
You can create your own custom skin for radGrid in the
Theme Builder as explained in the documentation
https://docs.telerik.com/devtools/aspnet-ajax/theme-builder/overview.
Once you do that copy the generated css files in the App_Themes or another folder and import them on the page with the grid you want to customize.
Set the Skin property with the name of the custom skin and the EnableEmbeddedSkins property of this grid to false:
The set the Skin property of the other grids on the page to one of the available built-in skins:
Make sure that the RenderMode properties of all grids are set to Lightweight.
For your convenience I recorded and attached a sample video demo.
Best regards,
Rumen
Progress Telerik
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