diff --git a/include/gdi.h b/include/gdi.h
index 8d80c9f4..82cdb4b3 100644
--- a/include/gdi.h
+++ b/include/gdi.h
@@ -5354,7 +5354,7 @@ typedef enum {
  *        the alpha and the color key settings of the source DC will be
  *        ignored if it is not \a COLOR_BLEND_LEGACY.
  *
- * \sa StretchBlt, SetMemDCAlpha, SetMemDCColorKey, ColorLogicalOp
+ * \sa StretchBlt, SetMemDCAlpha, SetMemDCColorKey, ColorBlendMethod
  */
 MG_EXPORT void GUIAPI BitBlt (HDC hsdc, int sx, int sy, int sw, int sh,
                 HDC hddc, int dx, int dy, DWORD dwRop);
@@ -5390,7 +5390,7 @@ MG_EXPORT void GUIAPI BitBlt (HDC hsdc, int sx, int sy, int sw, int sh,
  *        the alpha and the color key settings of the source DC will be
  *        ignored if it is not \a COLOR_BLEND_LEGACY.
  *
- * \sa BitBlt, SetMemDCAlpha, SetMemDCColorKey
+ * \sa BitBlt, SetMemDCAlpha, SetMemDCColorKey, ColorBlendMethod
  */
 MG_EXPORT void GUIAPI StretchBlt (HDC hsdc, int sx, int sy, int sw, int sh,
                 HDC hddc, int dx, int dy, int dw, int dh, DWORD dwRop);
diff --git a/include/window.h b/include/window.h
index 1b45e02a..c52fda63 100644
--- a/include/window.h
+++ b/include/window.h
@@ -7251,14 +7251,14 @@ MG_EXPORT BOOL GUIAPI SetMainWindowGestureFlags (HWND hWnd, DWORD dwFlags);
  *      the alpha channel value (0~255) along with the parameter \a arg.
  *  - CT_LOGICALPIXEL\n
  *      Do the given color logical operation. You should specify the color
- *      logical raster operation along with the pararmeter \a arg. See \a BitBlt.
+ *      logical raster operation along with the pararmeter \a arg. See \a ColorLogicalOp.
  *  - CT_ALPHAPIXEL\n
  *      The alpha component value of the source and/or the destination pixel go
  *      into effect. You can specify the color blend method along
  *      with the pararmeter \a arg. See \a ColorBlendMethod. Note that a specific
  *      compositor may not support this compositing type. The built-in `fallback`
- *      compositor ignores the blend mode argument and only always uses the
- *      Porter Duff blend mode: source over destination (COLOR_BLEND_PD_SRC_OVER).
+ *      compositor uses the blend mode argument when using Pixman, otherwise,
+ *      uses the Porter Duff blend mode: source over destination (COLOR_BLEND_PD_SRC_OVER).
  *  - CT_BLURRED\n
  *      Apply a Gaussian blur to the background of the main window. You should
  *      also specify the radius of the blur (0 ~ 255) in pixles along with the