docs: add subtitle for types of transformation

EscapedGibbon · EscapedGibbon · commit dac82a4ac15a · 2025-07-03T11:21:26.000+02:00
diff --git a/docs/Tutorials/Applying transform function on images.md b/docs/Tutorials/Applying transform function on images.md
@@ -4,6 +4,8 @@ Image transformations are fundamental operations in computer graphics and image
 
 In this tutorial, we distinguish between two primary types of transformations:
 
+## Types of transformation
+
 ### Affine Transformations
 
 - **Preserve**: Collinearity and ratios of distances
