Hi all, 
     
   I'm trying to export an isoline picture in .png format by using the Project->print view in file. The default picture size is 1280x1024 and this is how is looks. 
   <?xml version="1.0" encoding="UTF-8"?>
 
     
   This picture is not clear enough in my paper. So I change the picture size to 2560x2048 to try to get a picture of more DPI, but it turns out to be more blurry than the 1280x1024 one. 
   <?xml version="1.0" encoding="UTF-8"?>
 
     
   My questions: 
  -  Why is it more blurry with a larger picture size? 
  -  Is there another way to export a figure with high DPI? 
  
   
   Thanks!