Dear bob,
Thank you very much and I tried your suggestion. When I do "save pnm", I used the "TS.jpg" as the prefix of the filename, and I got a file with the name "TS.jpg.pnm". Then I removed the ".pnm". Did I understand you correctly?
If I did correctly, there is still another problem: the size of the file is too huge! If I use "save pnm" and removed ".pnm" from the filename, I got a file with the size of 2086KB. However, if I use the key "Print Screen" of the keyboard and save the screen as a ".jpg" file, the size of the created file is only 46KB (I did in this way when I posted the message " another question about filtering with 3dFourier" to the message board).
What is the best way to get an JPEG file from the Graph Window?
Best!
Meng
