Hello Gunther,
All locations and sizes of annotations are specified in device-independent untis (1/96th inch per unit).
Here is a code snippet that shows how to create text annotation at thw left bottom position of image:
// get reference to the first image
VintasoftImage image = annotationViewer1.Images[0];
// calculate image height in device-independent pixels (1/96th inch per unit)
float imageHeightInDIP = image.Height / image.Resolution.Vertical * 96f;
// create text annotation
TextAnnotationData textAnnoData = new TextAnnotationData();
textAnnoData.Text = "Test!";
textAnnoData.Font.Size = 36;
textAnnoData.Size = new SizeF(300, 200);
textAnnoData.Location = new PointF(textAnnoData.Size.Width / 2, imageHeightInDIP - textAnnoData.Size.Height / 2);
// create text annotation view
TextAnnotationView textAnnoView = new TextAnnotationView(textAnnoData);
// get reference to annotation view collection of first image
AnnotationViewCollection annoViews = annotationViewer1.AnnotationViewController[0];
// add text annotation view to annotation view collection of first image
annoViews.Add(textAnnoView);
Best regards, Alexander
