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1. headers_ :: Text -> Attribute

   lucid	Lucid.Html5

   The headers attribute.

2. head1 :: forall (t :: Type -> Type) a . Traversable1 t => Lens' (t a) a

   diagrams-lib	Diagrams.Prelude

   A Lens focusing on the first element of a Traversable1 container.

   >>> 2 :| [3, 4] & head1 +~ 10
   12 :| [3,4]
   

   >>> Identity True ^. head1
   True
   

3. headGap :: forall n f . Functor f => (Measure n -> f (Measure n)) -> ArrowOpts n -> f (ArrowOpts n)

   diagrams-lib	Diagrams.TwoD

   Distance to leave between the head and the target point.

4. headLength :: forall n f . Functor f => (Measure n -> f (Measure n)) -> ArrowOpts n -> f (ArrowOpts n)

   diagrams-lib	Diagrams.TwoD

   The length from the start of the joint to the tip of the head.

5. headStyle :: forall n f . Functor f => (Style V2 n -> f (Style V2 n)) -> ArrowOpts n -> f (ArrowOpts n)

   diagrams-lib	Diagrams.TwoD

   Style to apply to the head. headStyle is modified by using the lens combinator %~ to change the current style. For example, to change an opaque black arrowhead to translucent orange: (with & headStyle %~ fc orange . opacity 0.75).

6. headTexture :: TypeableFloat n => Lens' (ArrowOpts n) (Texture n)

   diagrams-lib	Diagrams.TwoD

   A lens for setting or modifying the texture of an arrowhead. For example, one may write ... (with & headTexture .~ grad) to get an arrow with a head filled with a gradient, assuming grad has been defined. Or ... (with & headTexture .~ solid blue to set the head color to blue. For more general control over the style of arrowheads, see headStyle.

7. headGap :: forall n f . Functor f => (Measure n -> f (Measure n)) -> ArrowOpts n -> f (ArrowOpts n)

   diagrams-lib	Diagrams.TwoD.Arrow

   Distance to leave between the head and the target point.

8. headLength :: forall n f . Functor f => (Measure n -> f (Measure n)) -> ArrowOpts n -> f (ArrowOpts n)

   diagrams-lib	Diagrams.TwoD.Arrow

   The length from the start of the joint to the tip of the head.

9. headStyle :: forall n f . Functor f => (Style V2 n -> f (Style V2 n)) -> ArrowOpts n -> f (ArrowOpts n)

   diagrams-lib	Diagrams.TwoD.Arrow

   Style to apply to the head. headStyle is modified by using the lens combinator %~ to change the current style. For example, to change an opaque black arrowhead to translucent orange: (with & headStyle %~ fc orange . opacity 0.75).

10. headTexture :: TypeableFloat n => Lens' (ArrowOpts n) (Texture n)

    diagrams-lib	Diagrams.TwoD.Arrow

    A lens for setting or modifying the texture of an arrowhead. For example, one may write ... (with & headTexture .~ grad) to get an arrow with a head filled with a gradient, assuming grad has been defined. Or ... (with & headTexture .~ solid blue to set the head color to blue. For more general control over the style of arrowheads, see headStyle.

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