You can open the report file in a web browser and print to pdf from the browser. The report HTML file is located in your project folder in /run/7-UserScript-0/mergedjob-0/report.html.

Note: depending on your run, the location might be slightly different than above. In general, it will be in the last 'UserScript' folder. If you have additional Reporting Measures in your model, there will be more than one 'mergedjob' folders, and you'll have to look in each to find the correct report file.