In the common case what you need to achieve can be done by using a script which calculates the size of the viewport minus the sum height of the header and the footer. The RadSplitter, however, provides a property called HeightOffset
- please configure your splitter to occupy 100% of the page and set the mentioned property to the sum of the heights of the header and footer and everything should start working as expected no matter the screen resolution. You can find more detailed explanations and a sample demo attached in the article below:
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