[pitivi] help: Document better the procedure of creating new layers

[Jean-François Fortin Tam <jfft src gnome org>]

commit 1169395d88487d228cf55abe6e19d50d3ee8b1e8
Author: Tomas Karger <tomkarger gmail com>
Date:   Mon Dec 30 07:52:26 2013 +0100

    help: Document better the procedure of creating new layers
    
    Fixes bug #720878

 help/C/layers.page     |    8 +++++---
 help/C/usingclips.page |    5 +++--
 2 files changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/help/C/layers.page b/help/C/layers.page
index 6574cb2..c078c46 100644
--- a/help/C/layers.page
+++ b/help/C/layers.page
@@ -5,7 +5,7 @@
 
   <info>
     <link type="guide" xref="index#timeline"/>
-    <revision pkgversion="0.13.4" version="0.1" date="2010-12-05" status="complete"/>
+    <revision pkgversion="0.13.4" version="0.1" date="2013-12-30" status="complete"/>
     <credit type="author">
       <name>Jean-François Fortin Tam</name>
       <email>nekohayo gmail com</email>
@@ -13,9 +13,11 @@
     <credit type="contributor">
       <name>Mario Blättermann</name>
       <email>mariobl gnome org</email>
+      <name>Tomáš Karger</name>
+      <email>tomkarger gmail com</email>
     </credit>
     <desc>
-      
+
     </desc>
     <license>
       <p>Creative Commons Share Alike 3.0</p>
@@ -46,7 +48,7 @@
      <section>
       <title>Adding and removing layers</title>
        <p>Layers are created and removed automatically. There is no “layer management” interface in 
<app>Pitivi</app> (at least, not yet).</p>
-       <p>To create a layer, drag a clip downwards until a new layer appears for it.</p>
+       <p>To create a layer, drag a clip to the middle space between two existing layers. Once the grey 
shadow (a thin rectangle) appears between the layers, release it.</p>
        <p>If there are no more clips on a layer, it is automatically removed. Thus, to remove a layer, 
simply drag its clips upwards onto another layer.</p>
      </section>
 
diff --git a/help/C/usingclips.page b/help/C/usingclips.page
index 8bf8349..ebda8e2 100644
--- a/help/C/usingclips.page
+++ b/help/C/usingclips.page
@@ -5,7 +5,7 @@
 
   <info>
     <link type="guide" xref="index#gettingstarted"/>
-    <revision pkgversion="0.92" version="0.1" date="2013-12-19" status="complete"/>
+    <revision pkgversion="0.92" version="0.1" date="2013-12-30" status="complete"/>
     <credit type="author">
       <name>Jean-François Fortin Tam</name>
       <email>nekohayo gmail com</email>
@@ -38,7 +38,8 @@
      <section>
       <title>Moving clips along the timeline</title>
        <p>You can move a clip within a layer or move it to a different layer.</p>
-       <p>Click and drag a single clip to move it, and release the mouse button to place it. Dragging 
horizontally keeps the clip on the same layer, but dragging it vertically moves the clip to a different 
layer.</p>
+       <p>Click and drag a single clip to move it, and release the mouse button to place it. Dragging 
horizontally keeps the clip on the same layer, but dragging it vertically moves the clip to a different layer 
(see <link xref="layers">Understanding layers</link> for more information).</p>
+       <p>To move a clip to an existing layer, drag it on the layer and release it when a grey shadow 
representing the space the clip would occupy appears. To move a clip to a new layer, drag it to the middle 
space between two existing layers. Once the grey shadow (now a thin rectangle) appears between the layers, 
release it.</p>
        <p>To move multiple clips at the same time, use the <key>Ctrl</key> or <key>Shift</key> keys to 
select multiple clips (see <link xref="makeselections">Making selections</link> for more details). Selected 
clips do not need to be on the same layer. Then, drag the clips just as you would do for a single clip; their 
position relative to each other will be preserved.</p>
       <section>
        <title>Using ripple editing while moving clips</title>