You can print a copy of the currently displayed dashboard/report from the Page Options menu:
1. Click the dot-menu 
located near the top-right corner of the dashboard.
2. Select print to Print the dashboard.
Note that this option isn't available for all the screens/reports. As an alternative, you can capture a screenshot or use an external plugin to capture the webpage and print it.
You can also export the Monitoring Reports, BI Reports, etc. as PDF/CSV files and then print them.