title: Coordinates in a pdf page when using pdfbox
body: <p>I am adding hidden text in pdf files to make them searchable. For some documents bottom left seems to be the default (0,0) where as for others it is top left. My understanding is that can because of page rotation. </p>
  
  <p>In the code below I am getting/printing page rotation but that is showing up as 0 for different test pdf files I have. Any ideas why some documents would translate (0,0) to bottom left while other would go to top left.</p>
  
  <pre><code>        File file = new File(inputDocumentName);
          PDDocument document = PDDocument.load(file);
  
          //Retrieving the pages of the document
          PDPage page = document.getPage(0);
  
          int rotation = page.getRotation();
          System.out.println("Rotation: " + rotation);
  
          contentStream.moveTo(0, 0);
  
          //Begin the Content stream
          contentStream.beginText();
  
          //Setting the font to the Content stream
          contentStream.setFont(PDType1Font.COURIER, 20);
  
          contentStream.newLineAtOffset(0, 0);
  
          //Adding text in the form of string
          contentStream.showText(text);
  
          //Ending the content stream
          contentStream.endText();
  
          //Closing the content stream
          contentStream.close();
  
          //Saving the document
          document.save(new File(outputDocumentName));
  
          //Closing the document
          document.close();
  </code></pre>
  
  <p>Any ideas on how can I find which corner (0,0) represent in a pdf document. Thanks.</p>