Currently, the width of the Dialog widget element is always restricted to fit within the width of the viewport (browser window). The height, however, is allowed to exceed the viewport height, which results in hidden content in the lower part of the Dialog. I would like to see the same restriction for the height of the widget as present for its width.

Further information could be found in the following Forum thread: https://www.telerik.com/forums/resizing-the-dialog---mobile-support