Hi João Loureiro,
Thank you for contacting Telerik Support.
You can close/reopen your RadDocumentPanes programmatically using the boolean RadDocumentPane's property IsHidden. When a RadDocumentPane is closed it is actually hidden and you can always make it visible again when needed.
Please make attention that RadDocumentPane is direct inheritor of RadPane it shares the same code base as its parent - the RadPane class. More information you can find here.
Attached you can find a sample example how programmatically
can close and reopen a RadDocumentPane.
I hope this information helps. Please set me know if you have any more questions.
the Telerik team
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