DefaultBoxStyle is a low-level option for three-dimensional graphics functions that specifies the default style to use in rendering the bounding box.
DefaultFaceGridsStyle is a low-level option for 3D graphics functions that specifies the default style to use in rendering face grids.
DefaultFieldHintStyle is a low-level option for InputField that specifies the default style to use for displaying the field hint.
DefaultFrameTicksStyle is a low-level option for 2D graphics functions that specifies the default style to use in rendering frame ticks.
DefaultGridLinesStyle is a low-level option for 2D graphics functions that specifies the default style to use in rendering grid lines.
DefaultLabelStyle is a low-level option for formatting and related constructs that specifies the default style to use in displaying their label-like elements.
DefaultMenuStyle is a low-level option for menu-generating constructs that specifies the default style to use for displaying menu items.
DefaultTicksStyle is a low-level option for graphics functions that specifies the default style to use in rendering ticks.
DiacriticalPositioning is an option for UnderscriptBox and related boxes that specifies how close diacritical characters are drawn to the base character.
First
(Built-in Mathematica Symbol) First[expr] gives the first element in expr.