NavigationView

Hello Mehdi,

I suppose that you have RadPageView in NavigationView mode. If you want to change the default look of the hamburger button you can achieve ii as shown below:

RadPageViewNavigationViewElement navigationElement = this.radPageView1.ViewElement as RadPageViewNavigationViewElement;
navigationElement.HamburgerButton.Text = "";
navigationElement.HamburgerButton.ImagePrimitive.Image = Image.FromFile(@"..//..//menuitem.png");
navigationElement.HamburgerButton.ImagePrimitive.ImageScaling = Telerik.WinControls.Enumerations.ImageScaling.SizeToFit;

This is the achieved result:

According to your second question, there are no built-in CSS-like animations in RadPageView. I can suggest you to take a look at the following help article which shows currently supported animations from Telerik Presentation Framework: https://docs.telerik.com/devtools/winforms/telerik-presentation-framework/animations

As to the question in your last post concerning sub-items in navigation view mode, I would like to note that we already have logged a feature request for this. You can track its progress, vote for it in order to increase its priority, subscribe for status changes and add your comments on the following link - feedback item. 

I hope this information helps. Should you have any other questions do not hesitate to ask.

Regards,
Nadya
Progress Telerik