From 6eca9dc7a18a233bc5feb2de77b50f7c1e51013b Mon Sep 17 00:00:00 2001
From: simoon <info@simonbrowne.biz>
Date: Tue, 21 Mar 2023 17:42:22 +1100
Subject: [PATCH] more README

---
 README.md | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 5a47d35..1811fb4 100644
--- a/README.md
+++ b/README.md
@@ -4,4 +4,18 @@ A set of scripts for doing things with PDF
 
 ## compression
 
-compresspdf.sh is a script made by members of [Open Source Publishing](http://osp.kitchen) that squashes large PDFs into very small ones using ```gs```, an open-source software suite for interpreting PostScript and PDF.
+compresspdf.sh is a script made by members of [Open Source Publishing](http://osp.kitchen) that squashes large PDFs into very small ones using ```gs``` (ghostscript), an open-source software suite for interpreting PostScript and PDF.
+
+First download and install ghostscript from here: https://www.ghostscript.com/
+
+To run the script, do:
+
+```./compresspdf.sh <file.pdf> <resolution in DPI>```
+
+For example:
+
+```./compresspdf.sh input.pdf 300```
+
+The output will be something like:
+
+```input-resampled.pdf```
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