diff --git a/src/config.sh b/src/config.sh
index b0667363..b6cfb5e3 100644
--- a/src/config.sh
+++ b/src/config.sh
@@ -1,3 +1,16 @@
+#####################################################################################
+# The following parameters might be changed by the user
+#####################################################################################
+
+DEFAULT_DPI=300				# dpi value used as fall back if the page dpi cannot be determined
+
+TMP="./tmp"				# location of the temporary files (one sub-folder will be created per PDF file to be processed)
+					# an absolute path or a path relative to the OCRmyPDF installation should be entered
+
+#####################################################################################
+# Do NOT change the following parameters
+#####################################################################################
+
 TOOLNAME="OCRmyPDF"
 VERSION="v2.x"
 
@@ -17,10 +30,6 @@ LOG_DEBUG="3"				# debug level logging
 
 # various paths
 SRC="./src"				# location of the source folder (except source of external tools like jhove)
-TMP="./tmp"				# location of the temporary files (one sub-folder will be created per PDF file to be processed)
 OCR_PAGE="$SRC/ocrPage.sh"		# path to the script aimed at OCRing one page
 JHOVE="./jhove/bin/JhoveApp.jar"	# java SW for validating the final PDF/A
 JHOVE_CFG="./jhove/conf/jhove.conf"	# location of the jhove config file
-
-# other 
-DEFAULT_DPI=300				# dpi value used as fall back if the page dpi cannot be determined