There is just an instance of a Report and all attributes get a default value. This means that the page format A4 in portrait mode. The margins are 20mm on the left side and 10mm on all other sides. To show the printable area a BoxFrame is added to the report body. The usage of BoxFrames can be found in a later example.
<?php
include_once "../src/Report.php";
use Adi\ReportLib as ReportLib;
// Create report instance
// default format A4, portrait with margins left = 20mm, top = 10mm, right = 10mm and bottom = 10mm
$report = new ReportLib\Report();
// Get ref to the report body
$body = $report->getBody();
// Create a box around the printable area
$box = $body->AddHBox(extent:0.1);
$box->setUseFullHeight(true);
// Produce the output of the report
// uses the same params as TCPDF (F = File, I = Preview etc.)
$report->output(__DIR__ . "/example_001.pdf", 'I');