- u -
- U3D : HPS::Publish::Annotation
- Underlined : HPS::Publish::Border
- Unique : HPS::ComponentPath
- Universal3D : HPS::Exchange::File
- Unknown : HPS::Emergency , HPS::Exchange , HPS::Info , HPS::Publish::Image , HPS::StandAloneWindowEvent
- Unsupported : HPS::Exchange::File , HPS::Info
- UpdateOptions : HPS::SceneTree
- URL : HPS::Publish::Image
- UseBackgroundColor : HPS::Hardcopy
- User : HPS::Publish::Permission
- UserComponent : HPS::Component
- UserData : HPS::SceneTree , HPS::Search
- UserDefined : HPS::Exchange::ProE
- UV : HPS::Material::Texture