Reports in the Report Builder are designed to be shared and viewed online where they can be updated at any time, include interactive elements, and are responsive (so they can be viewed easily on any device).
However, there may be times when you want to download a PDF instead. This can be easily done with a single click, available in 3 different locations:
On a live report
Click the Save as PDF button at the top of all live reports
In the Report Builder (Snapshot view)
Click the Download PDF button at the top of the page while editing a Snapshot
In the Report Builder (Main page)
Click the cloud icon next to a snapshot in the table on the Report Builder main page.