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Docs > Controls and Libraries > Docking Library > Examples > How to: Display all the hidden panels
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How to: Access auto-hidden panels
How to: Add controls to a panel
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How to: Display all the hidden panels
How to: Dock panels to a form
How to: Enable the auto hide feature for root panels
How to: Override the default behavior of a panel when it is closed
How to: Prevent dock panels from being docked to the form's right edge
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How to: Display all the hidden panels

The following code shows how to display all the hidden panels. 

using DevExpress.XtraBars.Docking;
// ...
while(dockManager1.HiddenPanels.Count > 0) {
   dockManager1.HiddenPanels[0].Visibility = DockVisibility.Visible;
}