Instructions:

1. Add Block using Add public elements button
2. Drag PrintPDFButton Block to your screen. 
3. Set ContainerId reference of a Container on your screen. 
4. Set a Filename for the generated file. 
5. Optionally, set a ButtonSize. 
6. Add button contents to the placeholder.

CSS helper class: 

With ".show-on-export" CSS helper class, you can hide content on screen to show on the pdf; eg. image of logo and so on... Simply apply this class to Container contents that you don't want to show on screen but you want to print on the pdf.