[Solved] How to set RadRichTextEditor 's font and size at Design Time ?

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asked on 26 Feb 2026, 06:35 AM

How to set RadRichTextEditor 's font and size at Design Time  ? 

Or

Using Customization's Theme ?

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Dinko | Tech Support Engineer
Telerik team
answered on 27 Feb 2026, 12:52 PM

Hi 林 暉凱,

Thank you for reaching out to us.

There is currently no direct way to globally set these properties for all instances via the Visual Studio designer or using theme. You will need to set the desired font and size for each RadRichTextEditor control individually in code. You can check the Setting Default Style Settings on the Document help section for more information.

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Dinko | Tech Support Engineer
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commented on 04 Mar 2026, 03:41 PM

i use the following code 

editor.RichTextBoxElement.ChangeFontFamily(new Telerik.WinControls.RichTextEditor.UI.FontFamily("Comic Sans MS")); editor.RichTextBoxElement.ChangeFontSize(Unit.PointToDip(12)); editor.RichTextBoxElement.ChangeFontStyle(Telerik.WinControls.RichTextEditor.UI.FontStyles.Italic); editor.RichTextBoxElement.ChangeFontWeight(Telerik.WinControls.RichTextEditor.UI.FontWeights.Bold); editor.DocumentInheritsDefaultStyleSettings = true;

and it does not work

Dinko | Tech Support Engineer
Telerik team
commented on 05 Mar 2026, 11:34 AM

I have tested the settings on my side, and they are applied correctly to the control and to the default RichTextEditorRibbonBar. When I run the application, I see that the options are set correctly:

I am also attaching my test project. Can you check it out on your side and let me know if I am missing something from your scenario: settings, text, etc.

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Dinko | Tech Support Engineer
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