[gimp-web] Per odinbc, fixed Layer_Mask tutorial desaturate option

[Pat David <patdavid src gnome org>]

commit 6b30134edf5a6c2c970e627dc5c1dd92bd2ce16f
Author: Pat David <patdavid gmail com>
Date:   Tue Sep 15 12:47:11 2015 -0500

    Per odinbc, fixed Layer_Mask tutorial desaturate option

 tutorials/Layer_Masks/index.htrw |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/tutorials/Layer_Masks/index.htrw b/tutorials/Layer_Masks/index.htrw
index 8e0ce40..abecc6d 100644
--- a/tutorials/Layer_Masks/index.htrw
+++ b/tutorials/Layer_Masks/index.htrw
@@ -96,6 +96,11 @@ A good example of the application of layer masks is doing selective colorization
 Start the process by duplicating the base image (Shift+Ctrl+D, or Right-Click layer &rarr; Duplicate Layer). 
From the menu:
 </p>
 <div class="MenuCmd"><span><u>L</u>ayer &rarr; D<u>u</u>plicate Layer</span></div>
+
+<p>
+    Then desaturate the upper layer using:
+</p>
+<div class="MenuCmd"><span>Colors &rarr; Desaturate</span></div>
 <p>
 Following the steps above, add a layer mask to the desaturated layer and initialize it to White (full 
opacity). At this point, the Layers dialog should look like this:
 </p>