There are two main locations that you can print a PDF report for a record from the web app. One is through the record popup and the other is through the record options in the data table.
To generate a PDF report for a record from the map view on the web app it is easiest to use the record popup.
Start by selecting a record on the map view to open the record popup. Once the record popup is opened and displayed on the screen, select the overflow menu icon (three horizontal lines). This will open up a drop down menu where you can select Print to generate a PDF report for that record.
You can also generate a report from the record options on the data table in the table or split/hybrid views. Click the record options button to the left of the record you would like to generate a report for, and then select Print from the popup menu.