- o -
- off
: MPENote
- onlyIncreaseInSize
: RectanglePlacement
- onlyReduceInSize
: RectanglePlacement
- openGL3_2
: OpenGLContext
- openMode
: FileBrowserComponent
- opennessClosed
: TreeViewItem
- opennessDefault
: TreeViewItem
- opennessOpen
: TreeViewItem
- operatorType
: Expression
- outlineColourId
: AlertWindow
, BooleanPropertyComponent
, BubbleComponent
, ComboBox
, GroupComponent
, Label
, ListBox
, TabbedComponent
, TextEditor
, TextPropertyComponent
, TooltipWindow
- outlineWhenEditingColourId
: Label