By default, The ParentBackAlpha property is 255. The ParentBackColor / ParentBackAlpha property specifies the color / transparency to show the parent portion of the radial menu.  The ParentSize property specifies the size to display the parent zone. The RadialLineColor( exRadialParentBorder) property specifies the color to show the border around the parent section of the control. The RadialLineColor(exRadialHotParent) property specifies the color to show the border around the parent section of the control, while the cursor hovers the parent section. 

The ParentImage property specifies the graphics ( image, icon, picture ) to be shown on the parent zone, based on the state of the radial menu. The ParentImageWidth / ParentImageHeight specifies the size to show the parent image, based on the radial menu's state.  The ParentPicture property indicates the picture to be shown on the parent zone's background. The PicturesPath property specifies the path to load the pictures from. The Image property specifies the item's image. The Images method loads icons into the control. Use the ReplaceIcon method to add, remove or clear icons in the control's images collection. The HTMLPicture adds or replaces a picture in HTML captions. The ParentPicture property indicates the picture to be shown on the parent zone's background. The AllowToggleExpand property specifies whether the radial menu can be shown in collapsed state. The Expanded property indicates whether the radial menu is expanded or collapsed. The State property specifies the state of the radial menu.