What about adding dynamic scrollbars to the HTML5 Diagram widget? As developer I'm familiar with the pan and zoom concept, but customers and normal users are expected to see scroll bars to move around a diagram. In this demo http://demos.telerik.com/kendo-ui/html5-diagram-sample-app you can add objects that fall outside of the main view, but no scroll bars appears. Here http://kendoui-feedback.telerik.com/forums/127393-telerik-kendo-ui-feedback/suggestions/6552432-html5-diagram-control-allow-scrolling was posted a similar request, but the scrollbars Kenshin suggested are static. The scrollbars does't readapt if the work area changes. If you move objects around, apply a different zoom, add more elements, and so on.