Thank you for your interest in Syncfusion products.
Our SfRichTextRibbon control is customized from Ribbon control with primary functionalities to provide rich text options for SfRichTextBoxAdv. We cannot modify the functionalities of SfRichTextRibbon. Instead we can customize Ribbon control similar to SfRichTextRibbon based on our requirement. We have prepared a sample to illustrate the same. Please do find the sample from below link. Try running the sample and let us know if this helps you.
Currently the online documentation for SfRichTextBoxAdv and SfRichTextRibbon is not available. We will publish it online and let you know once done . For now, you can refer our online documentation for WinRT SfRichTextBoxAdv control.
Please let us know if you have any other questions.
Arumuga Perumal S
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If you have any other further assistance related our SfRichTextBoxAdv control. We are ready to answer your queries.
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We were able to reproduce the issue with disposing SfRichTextBoxAdv control and have logged defect report regarding this. A support incident to track the status of this defect has been created under your account. Please log on to our support website to check for further updates.
Please let us know if you have require any further assistance.
Arumuga Perumal S.