The following will help you print just the visible region from the AnnotationViewer:

C#

AtalaImage img = (AtalaImage)annotateViewer1.Image.Clone(); 

int width = Convert.ToInt32(Math.Min((annotateViewer1.ClientSize.Width / annotateViewer1.Zoom), (annotateViewer1.Image.Width / annotateViewer1.Zoom))); 

int height = Convert.ToInt32(Math.Min((annotateViewer1.ClientSize.Height / annotateViewer1.Zoom), (annotateViewer1.Image.Height / annotateViewer1.Zoom))); 

int left = Convert.ToInt32(Math.Abs(annotateViewer1.ScrollPosition.X) / annotateViewer1.Zoom); int top = Convert.ToInt32(Math.Abs(annotateViewer1.ScrollPosition.Y) / annotateViewer1.Zoom); 

Rectangle rcView = new Rectangle(left, top, width, height); 

if (img.ColorDepth < 24) 
{ 
     img = img.GetChangedPixelFormat(PixelFormat.Pixel24bppBgr); 
} 

Bitmap bmp = img.ToBitmap(); 
annotateViewer1.Annotations.RenderAnnotations(new Atalasoft.Annotate.AnnotationImage(bmp)); 
img = AtalaImage.FromBitmap(bmp); 

CropCommand cmd = new CropCommand(rcView); 
img = cmd.Apply(img).Image; 

ImagePrintDocument doc = new ImagePrintDocument(img); 
doc.ScaleMode = PrintScaleMode.FitToEdges; 

using (PrintDialog dlg = new PrintDialog()) 
{
     dlg.Document = doc; 

     if (dlg.ShowDialog() == DialogResult.OK) 
          doc.Print(); 
} 

doc.Dispose(); 

VB.NET

Dim Img As Atalasoft.Imaging.AtalaImage = Me.AnnotateViewer1.Image.Clone 

' Get the viewable area of an image. 
Dim width As Integer = Convert.ToInt32(Math.Min((Me.AnnotateViewer1.ClientSize.Width / Me.AnnotateViewer1.Zoom), (Me.AnnotateViewer1.Image.Width / Me.AnnotateViewer1.Zoom))) 

Dim height As Integer = Convert.ToInt32(Math.Min((Me.AnnotateViewer1.ClientSize.Height / Me.AnnotateViewer1.Zoom), (Me.AnnotateViewer1.Image.Height / Me.AnnotateViewer1.Zoom))) 

Dim left As Integer = Convert.ToInt32(Math.Abs(Me.AnnotateViewer1.ScrollPosition.X) / Me.AnnotateViewer1.Zoom) 
Dim top As Integer = Convert.ToInt32(Math.Abs(Me.AnnotateViewer1.ScrollPosition.Y) / Me.AnnotateViewer1.Zoom) 
Dim rcView As Rectangle = New Rectangle(left, top, width, height) 

If Img.ColorDepth < 24 Then 
    Dim cmd24 As Atalasoft.Imaging.ImageProcessing.ChangePixelFormatCommand = _ 
         New Atalasoft.Imaging.ImageProcessing.ChangePixelFormatCommand(Atalasoft.Imaging.PixelFormat.Pixel24bppBgr) 

    Img = cmd24.Apply(Img).Image 
End If 

Dim bmp As Bitmap = Img.ToBitmap 

'Render the annotations to the cloned image for printing only 
Me.AnnotateViewer1.Annotations.RenderAnnotations(New Atalasoft.Annotate.AnnotationImage(bmp)) 
Img = Atalasoft.Imaging.AtalaImage.FromBitmap(bmp) 

Dim crop As Atalasoft.Imaging.ImageProcessing.CropCommand crop = New Atalasoft.Imaging.ImageProcessing.CropCommand(rcView) 

Img = crop.Apply(Img).Image 

Original Article:
Q10233 - HOWTO: Printing the Current View of the AnnotateViewer