.PSPDFKit-Stamp-Annotation
Is also:
.PSPDFKit-Annotation
The container for a stamp annotation.
The contained stamp is rendered as `canvas` when using PSPDFKit for Web Standalone
and `img` when using PSPDFKit Server.
.PSPDFKit-Toolbox-Opacity
Is also:
.PSPDFKit-Toolbox
Opacity dropdown slider toolbox container.