use strict;
use warnings;
use PDF::Builder;

my $pdf = PDF::Builder->open('in.pdf');

my $page_number=1;
$page = $pdf->openpage($page_number);
$font = $pdf->corefont('Helvetica-Bold');
  
# Add some text to the page
my $text = $page->text(); #this creates text, I need a text box
$text->font($font, 16);
$text->translate(200, 700);
$text->text('Hello World!');
 
# Save the PDF
$pdf->saveas('out.pdf');