The showtext attribute applies only for the standard toolbars of RadEditor (Default, ShowOnFocus, PageTop and Floating).
The RibbonBar modes are based on RadRibbonBar which does not offer such property. The medium and large RadRibbonBar buttons always display their command text. Only the small buttons do not show text.
If you want to hide the text of the large buttons, you can apply the following class:
.rrbTextContent { display: none !important; }
Kind regards,
Rumen
the Telerik team
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