Add description to pdftool.

1 files changed, 11 insertions, 0 deletions

diff --git a/pdftool.py b/pdftool.py
index f2fffa2..c4786cb 100644
--- a/pdftool.py
+++ b/pdftool.py
@@ -1,3 +1,14 @@
+"""
+Converts PDF documents to bitmaps and generates a C header file
+that can be rendered on Waveshare E-paper displays.
+Usage: python -m pdftool [document] [first page] [last page] [crop page]
+       document: path to PDF document
+       first page: start conversion at this page
+       last page: stop conversion at this page (inclusive)
+       crop page: an optional page number to use when determining area to crop. If not specified
+                  each page is croppped to minimize white borders.
+"""
+
 import os
 import re
 import sys