From c3e7f1c5acf3e19f01e8b6eca0e79f2c20e742e1 Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <valhalla@trueelena.org>
Date: Mon, 1 Jun 2026 19:53:50 +0200
Subject: one use of pdfjam

---
 source/desktop/index.rst                  |  1 +
 source/desktop/pdf_manipulation/index.rst | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 source/desktop/pdf_manipulation/index.rst

diff --git a/source/desktop/index.rst b/source/desktop/index.rst
index 353278f..93d6d04 100644
--- a/source/desktop/index.rst
+++ b/source/desktop/index.rst
@@ -8,4 +8,5 @@
 
    command_line_printing/index
    desktop_environment/index
+   pdf_manipulation/index
    verifying_debian_arm_installer_images/index
diff --git a/source/desktop/pdf_manipulation/index.rst b/source/desktop/pdf_manipulation/index.rst
new file mode 100644
index 0000000..9244c70
--- /dev/null
+++ b/source/desktop/pdf_manipulation/index.rst
@@ -0,0 +1,29 @@
+******************
+ PDF Manipulation
+******************
+
+A list of useful commands to manipulate PDF files.
+
+.. only:: html
+
+   .. contents::
+
+Page manipulation
+=================
+
+Cropping all pages of a pdf
+---------------------------
+
+To crop all pages of a PDF from e.g. A4 to A5, keeping only the top of
+the page::
+
+   pdfjam \
+      --papersize 210mm,148mm --trim "0mm 0mm 0mm 149mm" \
+      --scale 1 \
+      -o <output_file.pdf> <input_file.pdf>
+
+where the ``--trim`` option is not documented in pdfjam, but it's passed
+to ``\includegraphics`` and documented there.
+
+..
+   vim: set filetype=rst: 
-- 
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