RadVirtualGrid shold automatically adjust the height of the visible cells/rows only. When you perform scrolling horizontally or vertically, the respective scrollbar will be adjusted. The scrollbar may shrink or enlarge considering the currently displayed data. Have in mind that when you have a horizontal scrollbar, the row's height will be calculated according to the content of the visible cells on the row. If you scroll horizontally and some of the cells on the row get hidden and others get visible, the row's height should be adjusted according to the content. Initially, this behavior may be confusing for the users, however since data is loaded on demand in RadVirtualGrid, you need to autosize the rows on demand as well.