- t -
- tab : Origin::TextBox
- text : Origin::GraphCurve, Origin::Note, Origin::TextBox
- texts : Origin::GraphLayer
- thickness : Origin::GraphAxisFormat, Origin::PieProperties
- tickAxis : Origin::GraphAxis
- title : Origin::Window
- to : Origin::GraphAxisBreak
- top : Origin::Rect
- topContour : Origin::SurfaceProperties
- totalPoints : Origin::Function
- traversal_queue : tree< T, tree_node_allocator >::breadth_first_queued_iterator
- type : Origin::Color, Origin::Figure, Origin::Function, Origin::GraphCurve, Origin::ProjectNode, Origin::SpreadColumn, Origin::SurfaceProperties