Hi Yan Runming,
Thank you for contacting us.
What you are experiencing is an issue of RadToolStrip. The items shown in the DropDownMenu should be stacked vertically, not horizontally. Thus you will be able to access all items, without the help of a horizontal scrollbar. Apart from that, the default items (e.g. "Reset Layout", "Add or Remove Buttons" etc.) in the DropDownMenu cannot be easily customized. Our team would like to apologize for the inconvenience this may cause.
Because RadToolStrip has a number of known issues, we decided to create a brand new control that will replace RadToolStrip and address all its technical and visual issues. The new control will have better functionality and improved performance and therefore it will be more convenient both for you and the end-users. We will do our best to introduce this control in Q3 2010.
I hope you find this information useful. Thank you for the understanding.
All the best,
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items