### - o -

- octave : ControlButton
- oddItemsColourId : TreeView
- off : MPENote , PushNotifications::Notification
- onlyIncreaseInSize : RectanglePlacement
- onlyReduceInSize : RectanglePlacement
- openGL3_2 : OpenGLContext
- openMode : FileBrowserComponent
- opennessClosed : TreeViewItem
- opennessDefault : TreeViewItem
- opennessOpen : TreeViewItem
- operatorType : Expression
- otherMeter : AudioProcessorParameter
- outline : LookAndFeel_V4::ColourScheme
- outlineColourId : AlertWindow , BooleanPropertyComponent , BubbleComponent , ComboBox , GroupComponent , Label , ListBox , TabbedComponent , TableHeaderComponent , TextEditor , TextPropertyComponent , TooltipWindow
- outlineWhenEditingColourId : Label
- outputGain : AudioProcessorParameter
- outputMeter : AudioProcessorParameter