To reproduce: Richribbonbar have "table" in insert in demo , but in richribbonbar there is not any in picture 2 I am showing telerik demo, and in the first one is that I used in my program, does telerik lies in demo? Resolution: This issue is addressed in the new version of the controls - RadRichTextEditor and RichTextEditorRibbonBar. Please use the new controls instead the RadRichTextBox.
This is caused by the fact that the RibbonUI was created prior the addition of the tables support in the control, hence the missing option. We will consider this request as a request for updating the RibbonUI (http://www.telerik.com/help/winforms/richtextbox-features-ribbon-ui.html)