From the GUI:
- navigate to Device > Setup > Management
- Click the Edit icon for the Logging and Reporting Setting box and navigate to Log Export and Reporting tab.
- The second option down is Max Rows in CSV Export
- Set the value to the desired number (1 - 1048576).
From CLI:
- Go to configuration mode.
- # set deviceconfig setting management max-rows-in-csv-export <value>
Warning: Increasing the export to the maximum amount, 1048576, may cause management of the device to slow when exporting but will not affect the traffic traversing the firewall.
PAN-OS 7.0:

PAN-OS 9.0:
