For the best results shrink the page margins as much as possible. Goto Page Setup dialog box your browser, and set the margins as low as your printer will allow, 0.5" is good enough. You can improve printing results by following these steps:
You may also want to turn *ON* Print Background Images to see the grey backgrounds behind the headers in the print-out, but that's up to you, it doesn't make any difference one way or the other.
Currently the only way to save a mech is to save the actual print-out page as an HTML file on your local computer.
Make sure the the file name ends with .html or .htm, so your browser can view the file locally.