- o -

• offset : QgsGradientStop
• offsetType : QgsPalLayerSettings
• offsetUnits : QgsPalLayerSettings
• old_label : pal::ElemTrans
• onlySelectedFeatures : QgsVectorFileWriter::SaveVectorOptions
• opacity : QgsAbstractGeoPdfExporter::ComponentLayerDetail , QgsDiagramSettings , QgsLayoutItem::ExportLayerDetail
• openLicense : QgsDatumTransform::GridDetails
• operationDetails : QgsDatumTransform::TransformDetails
• orderBy : QgsAggregateCalculator::AggregateParameters
• organization : QgsAbstractMetadataBase::Contact
• origin : QgsFields::Field
• originalName : QgsFieldMappingModel::Field
• originalNodes : QgsLayerTreeModel::LayerLegendData
• originIndex : QgsFields::Field
• outputDirectory : QgsTemporalUtils::AnimationExportSettings
• outputFilename : QgsAlignRaster::Item
• outputFormat : QgsWfs::getFeatureRequest
• outputName : QgsProcessingContext::LayerDetails
• outputValues : QgsKernelDensityEstimation::Parameters
• overrideGeometryType : QgsVectorFileWriter::SaveVectorOptions