enterAnnotationCreationMode abstract method
Enters annotation creation mode for the specified annotationTool.
If no tool is specified, the platform default is used (typically AnnotationTool.inkPen).
Returns true if the mode was entered, false if the request was
rejected (e.g. the viewer is not ready), or null if the platform
does not report a result.
Implementation
Future<bool?> enterAnnotationCreationMode([AnnotationTool? annotationTool]);