Hi Shivkumar,
Thanks for using syncfusion products.
We suggest you to set the width to 100% for setting based on the screen resolution.
You may also refer the following UG online documentation link to know more information on Rotator control properties,
http://help.syncfusion.com/ug_93/User%20Interface/ASP.NET%20MVC/Tools/Documents/51611properties.htmRegards,
Varalakshmi R.S