Index - O
| Opacity | Data.Geometry.Ipe.Attributes, Data.Geometry.Ipe | 
| OpacitySym0 | Data.Geometry.Ipe.Attributes, Data.Geometry.Ipe | 
| Operation | Data.Geometry.Ipe.Types, Data.Geometry.Ipe | 
| orange | Data.Geometry.Ipe.Color | 
hgeometry-ipe-0.10.0.0: Reading and Writing ipe7 files.