Update 3 3 open layer

3-3-open-layer.md

@@ -14,16 +14,17 @@ After opening data files, you can add layers to the 3D-image in the **Rendering
     ![](img/3-3-1-edit-layer.png)
 
  
-After adding a layer, the program adds one more category corresponding to the added layer in *Menu Category*, such as *Horizontal Plane* category. This new category contains two panels. 
+After adding a layer, the program adds one more category corresponding to the added layer in *Menu Category*, such as *Horizontal Plane* category. 
+
+![](img/3-3-1-add-category.png)
+
+This new category contains two panels. 
 
 *  *Grid Options* panel contains buttons used to set the properties of the layer grid data to extract from the numerical model data.
 *  *Style* panel contains buttons used to set the display properties of the added layer.
 
 Note that the name of the added category and its ribbon are displayed differently with different added layer. 
 
-![](img/3-3-1-add-category.png)
-
-
 
 ##### Viewing data
 To display the data of a variable on the current layer, you can *select* that variable in the list (on the **Variables Pane**) and: