user: Describe Index – U from the Blender manual or Python API, including usage steps and snippets.

assistant: ovieTrackingSettings attribute)](bpy.types.MovieTrackingSettings.html#bpy.types.MovieTrackingSettings.use_default_brute) - [use_default_fade (bpy.types.Strip attribute)](bpy.types.Strip.html#bpy.types.Strip.use_default_fade) - [use_default_green_channel (bpy.types.MovieTrackingSettings attribute)](bpy.types.MovieTrackingSettings.html#bpy.types.MovieTrackingSettings.use_default_green_channel) - [use_default_interpolate (bpy.types.ParticleEdit attribute)](bpy.types.ParticleEdit.html#bpy.types.ParticleEdit.use_default_interpolate) - [use_default_mask (bpy.types.MovieTrackingSettings attribute)](bpy.types.MovieTrackingSettings.html#bpy.types.MovieTrackingSettings.use_default_mask) - [use_default_normalization (bpy.types.MovieTrackingSettings attribute)](bpy.types.MovieTrackingSettings.html#bpy.types.MovieTrackingSettings.use_default_normalization) - [use_default_red_channel (bpy.types.MovieTrackingSettings attribute)](bpy.types.MovieTrackingSettings.html#bpy.types.MovieTrackingSettings.use_default_red_channel) - [use_deform (bpy.types.Bone attribute)](bpy.types.Bone.html#bpy.types.Bone.use_deform)   - [(bpy.types.EditBone attribute)](bpy.types.EditBone.html#bpy.types.EditBone.use_deform)   - [(bpy.types.RigidBodyObject attribute)](bpy.types.RigidBodyObject.html#bpy.types.RigidBodyObject.use_deform) - [use_deform_bounds (bpy.types.Curve attribute)](bpy.types.Curve.html#bpy.types.Curve.use_deform_bounds) - [use_deform_only (bpy.types.Sculpt attribute)](bpy.types.Sculpt.html#bpy.types.Sculpt.use_deform_only) - [use_deform_preserve_volume (bpy.types.ArmatureConstraint attribute)](bpy.types.ArmatureConstraint.html#bpy.types.ArmatureConstraint.use_deform_preserve_volume)   - [(bpy.types.ArmatureModifier attribute)](bpy.types.ArmatureModifier.html#bpy.types.ArmatureModifier.use_deform_preserve_volume)   - [(bpy.types.GreasePencilArmatureModifier attribute)](bpy.types.GreasePencilArmatureModifier.html#bpy.types.GreasePencilArmatureModifier.use_deform_preserve_volume) - [use_deinterlace (bpy.types.EffectStrip attribute)](bpy.types.EffectStrip.html#bpy.types.EffectStrip.use_deinterlace)   - [(bpy.types.Image attribute)](bpy.types.Image.html#bpy.types.Image.use_deinterlace)   - [(bpy.types.ImageStrip attribute)](bpy.types.ImageStrip.html#bpy.types.ImageStrip.use_deinterlace)   - [(bpy.types.MaskStrip attribute)](bpy.types.MaskStrip.html#bpy.types.MaskStrip.use_deinterlace)   - [(bpy.types.MetaStrip attribute)](bpy.types.MetaStrip.html#bpy.types.MetaStrip.use_deinterlace)   - [(bpy.types.MovieClipStrip attribute)](bpy.types.MovieClipStrip.html#bpy.types.MovieClipStrip.use_deinterlace)   - [(bpy.types.MovieStrip attribute)](bpy.types.MovieStrip.html#bpy.types.MovieStrip.use_deinterlace)   - [(bpy.types.SceneStrip attribute)](bpy.types.SceneStrip.html#bpy.types.SceneStrip.use_deinterlace) - [use_denoise (bpy.types.RaytraceEEVEE attribute)](bpy.types.RaytraceEEVEE.html#bpy.types.RaytraceEEVEE.use_denoise) - [use_density_pressure (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_density_pressure) - [use_detail_preserve (bpy.types.GreasePencilLineartModifier attribute)](bpy.types.GreasePencilLineartModifier.html#bpy.types.GreasePencilLineartModifier.use_detail_preserve) - [use_diagnose (bpy.types.SoftBodySettings attribute)](bpy.types.SoftBodySettings.html#bpy.types.SoftBodySettings.use_diagnose) - [use_die_on_collision (bpy.types.ParticleSettings attribute)](bpy.types.ParticleSettings.html#bpy.types.ParticleSettings.use_die_on_collision) - [use_diffusion (bpy.types.FluidDomainSettings attribute)](bpy.types.FluidDomainSettings.html#bpy.types.FluidDomainSettings.use_diffusion) - [use_direction_parallel (bpy.types.NormalEditModifier attribute)](bpy.types.NormalEditModifier.html#bpy.types.NormalEditModifier.use_direction_parallel) - [use_disk_cache (bpy.types.PointCache attribute)](bpy.types.PointCache.html#bpy.types.PointCache.use_disk_cache)   - [(bpy.types.PointCacheItem attribute)](bpy.types.PointCacheItem.html#bpy.types.PointCacheItem.use_disk_cache) - [use_dissolve (bpy.types.DynamicPaintSurface attribute)](bpy.types.DynamicPaintSurface.html#bpy.types.DynamicPaintSurface.use_dissolve) - [use_dissolve_boundaries (bpy.types.DecimateModifier attribute)](bpy.types.DecimateModifier.html#bpy.types.DecimateModifier.use_dissolve_boundaries) - [use_dissolve_log (bpy.types.DynamicPaintSurface attribute)](bpy.types.DynamicPaintSurface.html#bpy.types.DynamicPaintSurface.use_dissolve_log) - [use_dissolve_smoke (bpy.types.FluidDomainSettings attribute)](bpy.types.FluidDomainSettings.html#bpy.types.FluidDomainSettings.use_dissolve_smoke) - [use_dissolve_smoke_log (bpy.types.FluidDomainSettings attribute)](bpy.types.FluidDomainSettings.html#bpy.types.FluidDomainSettings.use_dissolve_smoke_log) - [use_dof (bpy.types.CameraDOFSettings attribute)](bpy.types.CameraDOFSettings.html#bpy.types.CameraDOFSettings.use_dof)   - [(bpy.types.View3DShading attribute)](bpy.types.View3DShading.html#bpy.types.View3DShading.use_dof) - [use_dof_mode (bpy.types.ShaderFxBlur attribute)](bpy.types.ShaderFxBlur.html#bpy.types.ShaderFxBlur.use_dof_mode) - [use_drag_immediately (bpy.types.PreferencesInput attribute)](bpy.types.PreferencesInput.html#bpy.types.PreferencesInput.use_drag_immediately) - [use_draw_hover (bpy.types.Gizmo attribute)](bpy.types.Gizmo.html#bpy.types.Gizmo.use_draw_hover) - [use_draw_modal (bpy.types.Gizmo attribute)](bpy.types.Gizmo.html#bpy.types.Gizmo.use_draw_modal) - [use_draw_offset_scale (bpy.types.Gizmo attribute)](bpy.types.Gizmo.html#bpy.types.Gizmo.use_draw_offset_scale) - [use_draw_scale (bpy.types.Gizmo attribute)](bpy.types.Gizmo.html#bpy.types.Gizmo.use_draw_scale) - [use_draw_value (bpy.types.Gizmo attribute)](bpy.types.Gizmo.html#bpy.types.Gizmo.use_draw_value) - [use_drip (bpy.types.DynamicPaintSurface attribute)](bpy.types.DynamicPaintSurface.html#bpy.types.DynamicPaintSurface.use_drip) - [use_dry_log (bpy.types.DynamicPaintSurface attribute)](bpy.types.DynamicPaintSurface.html#bpy.types.DynamicPaintSurface.use_dry_log) - [use_drying (bpy.types.DynamicPaintSurface attribute)](bpy.types.DynamicPaintSurface.html#bpy.types.DynamicPaintSurface.use_drying) - [use_duplicate_action (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_action) - [use_duplicate_armature (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_armature) - [use_duplicate_camera (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_camera) - [use_duplicate_curve (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_curve) - [use_duplicate_curves (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_curves) - [use_duplicate_grease_pencil (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_grease_pencil) - [use_duplicate_lattice (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_lattice) - [use_duplicate_light (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_light) - [use_duplicate_lightprobe (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_lightprobe) - [use_duplicate_material (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_material) - [use_duplicate_mesh (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_mesh) - [use_duplicate_metaball (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_metaball) - [use_duplicate_node_tree (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_node_tree) - [use_duplicate_particle (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_particle) - [use_duplicate_pointcloud (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_pointcloud) - [use_duplicate_speaker (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_speaker) - [use_duplicate_surface (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_surface) - [use_duplicate_text (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_text) - [use_duplicate_volume (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_duplicate_volume) - [use_dynamic_bind (bpy.types.MeshDeformModifier attribute)](bpy.types.MeshDeformModifier.html#bpy.types.MeshDeformModifier.use_dynamic_bind) - [use_dynamic_mesh (bpy.types.ClothSettings attribute)](bpy.types.ClothSettings.html#bpy.types.ClothSettings.use_dynamic_mesh) - [use_dynamic_rotation (bpy.types.ParticleSettings attribute)](bpy.types.ParticleSettings.html#bpy.types.ParticleSettings.use_dynamic_rotation) - [use_edge_angle (bpy.types.EdgeSplitModifier attribute)](bpy.types.EdgeSplitModifier.html#bpy.types.EdgeSplitModifier.use_edge_angle) - [use_edge_collision (bpy.types.SoftBodySettings attribute)](bpy.types.SoftBodySettings.html#bpy.types.SoftBodySettings.use_edge_collision) - [use_edge_cut (bpy.types.ExplodeModifier attribute)](bpy.types.ExplodeModifier.html#bpy.types.ExplodeModifier.use_edge_cut) - [use_edge_data (bpy.types.DataTransferModifier attribute)](bpy.types.DataTransferModifier.html#bpy.types.DataTransferModifier.use_edge_data) - [use_edge_mark (bpy.types.GreasePencilLineartModifier attribute)](bpy.types.GreasePencilLineartModifier.html#bpy.types.GreasePencilLineartModifier.use_edge_mark) - [use_edge_overlap (bpy.types.GreasePencilLineartModifier attribute)](bpy.types.GreasePencilLineartModifier.html#bpy.types.GreasePencilLineartModifier.use_edge_overlap) - [use_edge_path_live_unwrap (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_edge_path_live_unwrap) - [use_edge_sharp (bpy.types.EdgeSplitModifier attribute)](bpy.types.EdgeSplitModifier.html#bpy.types.EdgeSplitModifier.use_edge_sharp)   - [(bpy.types.MeshEdge attribute)](bpy.types.MeshEdge.html#bpy.types.MeshEdge.use_edge_sharp) - [use_edge_to_edge (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_edge_to_edge) - [use_edges (bpy.types.SoftBodySettings attribute)](bpy.types.SoftBodySettings.html#bpy.types.SoftBodySettings.use_edges) - [use_edit_mode_smooth_wire (bpy.types.PreferencesSystem attribute)](bpy.types.PreferencesSystem.html#bpy.types.PreferencesSystem.use_edit_mode_smooth_wire) - [use_edit_position (bpy.types.BrushGpencilSettings attribute)](bpy.types.BrushGpencilSettings.html#bpy.types.BrushGpencilSettings.use_edit_position)   - [(bpy.types.GreasePencilSmoothModifier attribute)](bpy.types.GreasePencilSmoothModifier.html#bpy.types.GreasePencilSmoothModifier.use_edit_position) - [use_edit_strength (bpy.types.BrushGpencilSettings attribute)](bpy.types.BrushGpencilSettings.html#bpy.types.BrushGpencilSettings.use_edit_strength)   - [(bpy.types.GreasePencilSmoothModifier attribute)](bpy.types.GreasePencilSmoothModifier.html#bpy.types.GreasePencilSmoothModifier.use_edit_strength) - [use_edit_thickness (bpy.types.BrushGpencilSettings attribute)](bpy.types.BrushGpencilSettings.html#bpy.types.BrushGpencilSettings.use_edit_thickness)   - [(bpy.types.GreasePencilSmoothModifier attribute)](bpy.types.GreasePencilSmoothModifier.html#bpy.types.GreasePencilSmoothModifier.use_edit_thickness) - [use_edit_uv (bpy.types.BrushGpencilSettings attribute)](bpy.types.BrushGpencilSettings.html#bpy.types.BrushGpencilSettings.use_edit_uv)   - [(bpy.types.GreasePencilSmoothModifier attribute)](bpy.types.GreasePencilSmoothModifier.html#bpy.types.GreasePencilSmoothModifier.use_edit_uv) - [use_eevee_debug (bpy.types.PreferencesExperimental attribute)](bpy.types.PreferencesExperimental.html#bpy.types.PreferencesExperimental.use_eevee_debug) - [use_eevee_finite_volume (bpy.types.World attribute)](bpy.types.World.html#bpy.types.World.use_eevee_finite_volume) - [use_effector (bpy.types.FluidEffectorSettings attribute)](bpy.types.FluidEffectorSettings.html#bpy.types.FluidEffectorSettings.use_effector) - [use_emit_random (bpy.types.ParticleSettings attribute)](bpy.types.ParticleSettings.html#bpy.types.ParticleSettings.use_emit_random) - [use_emitter_deflect (bpy.types.ParticleEdit attribute)](bpy.types.ParticleEdit.html#bpy.types.ParticleEdit.use_emitter_deflect) - [use_empty_image_alpha (bpy.types.Object attribute)](bpy.types.Object.html#bpy.types.Object.use_empty_image_alpha) - [use_emulate_numpad (bpy.types.PreferencesInput attribute)](bpy.types.PreferencesInput.html#bpy.types.PreferencesInput.use_emulate_numpad) - [use_endpoint_u (bpy.types.Spline attribute)](bpy.types.Spline.html#bpy.types.Spline.use_endpoint_u) - [use_endpoint_v (bpy.types.Spline attribute)](bpy.types.Spline.html#bpy.types.Spline.use_endpoint_v) - [use_endroll_as_inroll (bpy.types.Bone attribute)](bpy.types.Bone.html#bpy.types.Bone.use_endroll_as_inroll)   - [(bpy.types.EditBone attribute)](bpy.types.EditBone.html#bpy.types.EditBone.use_endroll_as_inroll) - [use_enter_edit_mode (bpy.types.PreferencesEdit attribute)](bpy.types.PreferencesEdit.html#bpy.types.PreferencesEdit.use_enter_edit_mode) - [use_entire_array (bpy.types.KeyingSetPath attribute)](bpy.types.KeyingSetPath.html#bpy.types.KeyingSetPath.use_entire_array) - [use_envelope_multiply (bpy.types.Bone attribute)](bpy.types.Bone.html#bpy.types.Bone.use_envelope_multiply)   - [(bpy.types.EditBone attribute)](bpy.types.EditBone.html#bpy.types.EditBone.use_envelope_multiply) - [use_estimate_matrix (bpy.types.SoftBodySettings attribute)](bpy.types.SoftBodySettings.html#bpy.types.SoftBodySettings.use_estimate_matrix) - [use_eval_time (bpy.types.ActionConstraint attribute)](bpy.types.ActionConstraint.html#bpy.types.ActionConstraint.use_eval_time) - [use_even_distribution (bpy.types.ParticleSettings attribute)](bpy.types.ParticleSettings.html#bpy.types.ParticleSettings.use_even_distribution) - [use_even_divisions (bpy.types.SplineIKConstraint attribute)](bpy.types.SplineIKConstraint.html#bpy.types.SplineIKConstraint.use_even_divisions) - [use_even_offset (bpy.types.SolidifyModifier attribute)](bpy.types.SolidifyModifier.html#bpy.types.SolidifyModifier.use_even_offset)   - [(bpy.types.WireframeModifier attribute)](bpy.types.WireframeModifier.html#bpy.types.WireframeModifier.use_even_offset) - [use_event_handle_all (bpy.types.Gizmo attribute)](bpy.types.Gizmo.html#bpy.types.Gizmo.use_event_handle_all) - [use_event_simulate (in module bpy.app)](bpy.app.html#bpy.app.use_event_simulate) - [use_exr_interleave (bpy.types.ImageFormatSettings attribute)](bpy.types.ImageFormatSettings.html#bpy.types.ImageFormatSettings.use_exr_interleave) - [use_extended_asset_browser (bpy.types.PreferencesExperimental attribute)](bpy.types.PreferencesExperimental.html#bpy.types.PreferencesExperimental.use_extended_asset_browser) - [use_extension_online_access_handled (bpy.types.PreferencesFilePaths attribute)](bpy.types.PreferencesFilePaths.html#bpy.types.PreferencesFilePaths.use_extension_online_access_handled) - [use_extensions_debug (bpy.types.PreferencesExperimental attribute)](bpy.types.PreferencesExperimental.html#bpy.types.PreferencesExperimental.use_extensions_debug) - [use_external (bpy.types.PointCache attribute)](bpy.types.PointCache.html#bpy.types.PointCache.use_external)   - [(bpy.types.PointCacheItem attribute)](bpy.types.PointCacheItem.html#bpy.types.PointCacheItem.use_external) - [use_extra_user (bpy.types.ID attribute)](bpy.types.ID.html#bpy.types.ID.use_extra_user) - [use_face_collision (bpy.types.SoftBodySettings attribute)](bpy.types.SoftBodySettings.html#bpy.types.SoftBodySettings.use_face_collision) - [use_face_influence (bpy.types.WeightedNormalModifier attribute)](bpy.types.WeightedNormalModifier.html#bpy.types.WeightedNormalModifier.use_face_influence) - [use_face_mark (bpy.types.GreasePencilLineartModifier attribute)](bpy.types.GreasePencilLineartModifier.html#bpy.types.GreasePencilLineartModifier.use_face_mark) - [use_face_mark_boundaries (bpy.types.GreasePencilLineartModifier attribute)](bpy.types.GreasePencilLineartModifier.html#bpy.types.GreasePencilLineartModifier.use_face_mark_boundaries) - [use_face_mark_invert (bpy.types.GreasePencilLineartModifier attribute)](bpy.types.GreasePencilLineartModifier.html#bpy.types.GreasePencilLineartModifier.use_face_mark_invert) - [use_face_mark_keep_contour (bpy.types.GreasePencilLineartModifier attribute)](bpy.types.GreasePencilLineartModifier.html#bpy.types.GreasePencilLineartModifier.use_face_mark_keep_contour) - [use_factor_density (bpy.types.SPHFluidSettings attribute)](bpy.types.SPHFluidSettings.html#bpy.types.SPHFluidSettings.use_factor_density) - [use_factor_radius (bpy.types.SPHFluidSettings attribute)](bpy.types.SPHFluidSettings.html#bpy.types.SPHFluidSettings.use_factor_radius) - [use_factor_repulsion (bpy.types.SPHFluidSettings attribute)](bpy.types.SPHFluidSettings.html#bpy.types.SPHFluidSettings.use_factor_repulsion) - [use_factor_rest_length (bpy.types.SPHFluidSettings attribute)](bpy.types.SPHFluidSettings.html#bpy.types.SPHFluidSettings.use_factor_rest_length) - [use_factor_stiff_viscosity (bpy.types.SPHFluidSettings attribute)](bpy.types.SPHFluidSettings.html#bpy.types.SPHFluidSettings.use_factor_stiff_viscosity) - [use_fade (bpy.types.GreasePencilMultiplyModifier attribute)](bpy.types.GreasePencilMultiplyModifier.html#bpy.types.GreasePencilMultiplyModifier.use_fade) - [use_fade_time (bpy.types.ParticleEdit attribute)](bpy.typ