Hi Andreas,
Thanks for your interest in Syncfusion products.
How to determine the position of the last element Kindly refer the below code snippet which helps to determine the position of the last element.
[C#]
//Create a new image.
PdfBitmap bmp = new PdfBitmap(@"..\..\Data\Image1.png");
//Set the initial position
PointF point=new PointF(0,0);
//Create a layout format and draws an image
PdfLayoutResult result = bmp.Draw(page, point);
//Create a new image.
bmp = new PdfBitmap(@"..\..\Data\Image2.png");
//Set the position of a new image.
point = new PointF(result.Bounds.Left, result.Bounds.Bottom+20);
//Draws an image.
result = bmp.Draw(page, point);
Please do find the sample from the below specified location which demonstrates how to determine the position of the last element and let me know if this helps.
http://files.syncfusion.com/support/pdf.Windows/F88434/PDFImages.zipRegards,
Thiru