Update frontenddevelopers.rst

docs/building_your_site/frontenddevelopers.rst

@@ -186,34 +186,32 @@ The available resizing methods are:
 More control over the ``img`` tag
 ---------------------------------
 
-Greater control over the ``img`` tag is often required, for example to add a custom ``class``. This can be most easily achieved in two ways:
+Wagtail provides two shorcuts to gain grater greater control over the ``img`` element:
 
 .. versionadded:: 0.4
-
 **Adding attributes to the  {% image %} tag**
 
-Simply add extra attributes with the syntax ``attribute="value"`` to the tag:
+Extra attributes can be specified with the syntax ``attribute="value"``:
 
 .. code-block:: django
 
     {% image self.photo width-400 class="foo" id="bar" %}
 
+No validation is performed on attributes add in this way by the developer. It's possible to add `src`, `width`, `height` and `alt` of your own that might conflict with those generated by the tag itself.
+
 
 **Generating the image "as"**
 
-
 Wagtail can assign the image data to another object using Django's ``as`` syntax:
 
 .. code-block:: django
     
-    {% load image %}
-    ...
     {% image self.photo width-400 as tmp_photo %}
 
     <img src="{{ tmp_photo.src }}" width="{{ tmp_photo.width }}" 
         height="{{ tmp_photo.height }}" alt="{{ tmp_photo.alt }}" class="my-custom-class" />
 
-
+.. versionadded:: 0.4
 The ``attrs`` shortcut
 -----------------------