Thank you for writing.
By default RadRibbonBar uses the ALT+key combination for Key tips
. Key tips allow the user to easily discover the keyboard shortcuts for any ribbon bar item. To display the valid key tips at any time, press and release the Alt key.
You can disable key tips by setting the EnableKeyMap property to false:
radRibbonBar1.EnableKeyMap = false;
If you have any additional questions, feel free to contact me.
the Telerik team