Q: How can I alter the height of the RadRibbonBar control?
A: Since we have different items placed in the RadRibbonBar control (for instance Quick access Toolbar, ContextualTabs, Groups, Buttons whose image size may vary from small to large as described here) the current design of the RadRibbonBar control does not allow altering of its height. Another reason for that is a very possible distortion of the control's layout. For example you might have issues with the layout of the buttons and/or the groups in the tabs. Therefore we would not recommend that you change the height of the control.
Q: How can I collapse RadRibbonBar control?
A: Since Q2 2012 you can use the EnableMinimizing property of the control in a combination with the Minimized property.