nutrient/com.pspdfkit.signatures/Signature/alpha

alpha

@get:FloatRange(from = 0.0, to = 1.0, fromInclusive = false)

Opacity of the signature, where 1 is fully opaque. Applied as the alpha of the annotation produced by toAnnotation, so it applies to both ink and stamp signatures.

Note that this is deliberately separate from inkColor: PDF annotation colours have no alpha channel, so the alpha component of inkColor is discarded when the annotation is created.