Forwarded from Launchpad: https://bugs.launchpad.net/ubuntu/+source/grace/+bug/119638 grace supports PDF. However, it appears that the Ubuntu packages have not compiled in this support.
grace's PDF support is deliberately disabled because PDFLib Lite isn't DFSG-free software (no commercial use). It can't be linked both because it would kick grace out of main into non-free, and because PDFLib isn't packaged for Debian, so it's not an option even then. See README.Debian for the two workarounds.
grace's PDF support is deliberately disabled because PDFLib Lite isn't DFSG-free software (no commercial use). It can't be linked both because it would kick grace out of main into non-free, and because PDFLib isn't packaged for Debian, so it's not an option even then. See README.Debian for the two workarounds.