diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77ca8c9..eec392a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,16 @@
 # Changelog
 
 ## 1.3.x
-### 1.3.3: Patch – Increased Preview Performance x2
+### 1.3.4: Fix - Spelling (25.04.01)
+- Fixed misspelling in preview window.
+
+### 1.3.3: Patch – Increased Preview Performance x2 (25.04.01)
 - Reduced preview stutter: Previously, the image was updated twice when changing brightness or contrast. Now, it updates only once, improving performance by 100%.
 - There is still room for improvement. Analysis shows that image processing takes the most time, while displaying in Qt is relatively fast. Reducing the image size impacts performance, so resizing to 50% is a good idea.
 - There is an issue where `QRunner` does not always finish in the correct order when brightness or contrast values are changed rapidly. ATM I do not know how to fix this easly.
 - The "Preview" watermark now displays the brightness and contrast levels of the shown image.
 
-### 1.3.2 Fix - Fixed problem with app folders (25.03.30)
+### 1.3.2: Fix - Fixed problem with app folders (25.03.30)
 - Fixed a problem that the app folder path was not generated correctly.
 
 ### 1.3.1: Fix - Fixed insert exif not working (25.03.27)
diff --git a/src/OptimaLab35/previewWindow.py b/src/OptimaLab35/previewWindow.py
index 8f0a656..82161d2 100644
--- a/src/OptimaLab35/previewWindow.py
+++ b/src/OptimaLab35/previewWindow.py
@@ -152,7 +152,7 @@ class ImageProcessorWorker(QRunnable):
         try:
             img = self.optima_manager.process_image_object(
                 image_input_file = self.path,
-                watermark = f"PREVIEW B:{self.brightness} S:{self.contrast}",
+                watermark = f"PREVIEW B:{self.brightness} C:{self.contrast}",
                 font_size = 1,
                 resize = self.resize,
                 grayscale = self.grayscale,