An alternate image: another version of an image, for printing or for another optional content state.
public sealed class PdfAlternateImage
ISO 32000-2 §8.9.5.4, Table 89. Read from the base image's Alternates array (PDF 1.3). The selection rules of §8.9.5.4
depend on the output and optional content, so none is selected here: content runs apply them when an image is painted (see
CreateDisplayList(DisplayLayers, DisplayIntent, ContentOptions)).
kind:method, kind:property, kind:ctor. Press Esc to clear.DefaultForPrintingGets a value indicating whether this alternate is the one to print (DefaultForPrinting, default false).DictionaryGets the alternate image dictionary.ImageGets the alternate image (Image).OptionalContentGets the optional content group or membership dictionary that selects this alternate (OC, PDF 1.5), or null.