If you have completed your learning path and the progress bar states 100%:
From the homeroom page in the My Learning Path widget is a Print Certificate button located in the Actions column next to the Learning Path title:
Additionally, once you have completed all required lessons you will see a Print Certificate button appear on the bottom bar when you are viewing a Learning Path.
If you have completed a learning path but the option to print the certificate does not display:
This is normally due to assets in the learning path not being marked as completed.
Open the learning path you need the certificate for and open the syllabus slide out on the left and make sure all assets have a green tick next to them:
If there is an asset without a green tick, you will need to open that asset and ensure the Completed checkbox has been checked:
Once these are all checked and the every asset has a green tick the My Progress bar will state 100% and you will have access to print the certificate: