diff --git a/.functions.sh b/.functions.sh
index ebaf8db..2804283 100644
--- a/.functions.sh
+++ b/.functions.sh
@@ -1,5 +1,13 @@
 #!/bin/bash
 
+function watermark(){
+    # Add watermark text to image (ImageMagick depentant)
+    # $1 = source file
+    # $2 = watermark text
+    # $3 = destination file
+    convert -density 150 -fill  "rgba(255,0,0,0.25)"  -gravity Center -pointsize 80 -draw "rotate -45 text 0,0 \"$2\""  "$1" "$3"
+}
+
 function reset_evolution() {
     # Reset evolution calendar factory
     # When it hangs connecting to EWS calendar outlooko365