diff --git a/README.md b/README.md
index 05f6a60..de745c6 100644
--- a/README.md
+++ b/README.md
@@ -231,6 +231,7 @@ Additional Notes:
  - File and folder names with spaces should be quoted or escaped.
  - The scaling is centered and using a scale bigger than 1 may
    result on cropping parts of the pdf.
+ - Most of the options are case-insensitive, Ex: -m PdFinFo
 
 Examples:
  pdfscale myPdfFile.pdf
diff --git a/pdfScale.sh b/pdfScale.sh
index 5c49fb1..47643c3 100755
--- a/pdfScale.sh
+++ b/pdfScale.sh
@@ -1116,6 +1116,7 @@ Additional Notes:
  - File and folder names with spaces should be quoted or escaped.
  - The scaling is centered and using a scale bigger than 1 may
    result on cropping parts of the pdf.
+ - Most of the options are case-insensitive, Ex: -m PdFinFo
 
 Examples:
  $PDFSCALE_NAME myPdfFile.pdf