RadSplitter uses skins to control its overall look-and-feel. A skin is a set of images and a CSS stylesheet that can be applied to the control elements (items, images, etc.) and defines their look and feel. The RadSplitter skin affects the appearance of any RadPane, RadSplitBar, RadSlidingZone, and RadSlidingPane controls nested inside the splitter. You can however, assign a different skin to any nested splitters.
To apply a skin to a RadSplitter control, set its Skin property, either using the properties pane or the Smart Tag.
RadSplitter is installed with a number of preset skins. These are shown below:
The Material skin is available for the Lightweight RenderMode only. If you experience visual issues with it, make sure your controls are not using the default Classic mode.
You can tweak the existing skins or create your own. Each skin has two main elements: images and a stylesheet. When creating your own, it is a good idea to start with the stylesheet for an existing skin and alter that. See Creating a Custom Skin for a step-by-step walk through. To use your own skin
Add the new CSS file to your project.
Drag and drop the CSS file from the Project Explorer onto your Web page.
Set the EnableEmbeddedSkins property of the control to False.
The stylesheet for a RadSplitter skin has the name Splitter.[SkinName].css and can be found in the ...Skins/[SkinName] directory. The images are found in the ...Skins/[SkinName]/Splitter directory. For example, the stylesheet for the "Black" skin is called Splitter.Black.css and is located in the ...Skins/Black directory. The images are found in the ...Skins/Black/Splitter directory. The images are referenced by name from within the stylesheet.
For more information on the CSS File structure, see Understanding the Skin CSS File.