You can export any scene storyboard as a PDF directly from the Storyboards tab.
Procedure
To export a storyboard to PDF
Go to app.filmustage.com, and then open your project.
In the top navigation bar, click Storyboards.
From the scenes list on the left, select a scene.
In the top right corner, click Export and select PDF.
In the print dialog that opens, select Save as PDF as the destination and click Save.
The storyboard is saved as a PDF file to your computer.
Plans
Exporting a storyboard to PDF is available on all plans, including Free.