i'm using RadMenu with huge data and using scroll on it by EnableRootItemScroll="true".
i want to set width of control = percentage not fixed width px and doesn't affect of EnableRootItemScroll.
thanks shinu for your replay ,but if i set percentage like 75% control take percentage from number of item in control
if i have 20 items so control will appear 15 item and that will expand page width .
how can i acquire Responsive in this case?