diff --git a/caravel/assets/images/viz_thumbnails/box_plot.png b/caravel/assets/images/viz_thumbnails/box_plot.png
new file mode 100644
index 000000000..de8f061a6
Binary files /dev/null and b/caravel/assets/images/viz_thumbnails/box_plot.png differ
diff --git a/caravel/assets/images/viz_thumbnails/force_directed.png b/caravel/assets/images/viz_thumbnails/directed_force.png
similarity index 100%
rename from caravel/assets/images/viz_thumbnails/force_directed.png
rename to caravel/assets/images/viz_thumbnails/directed_force.png
diff --git a/caravel/assets/images/viz_thumbnails/iframe.png b/caravel/assets/images/viz_thumbnails/iframe.png
new file mode 100644
index 000000000..d5f0f564a
Binary files /dev/null and b/caravel/assets/images/viz_thumbnails/iframe.png differ
diff --git a/caravel/assets/images/viz_thumbnails/treemap.png b/caravel/assets/images/viz_thumbnails/treemap.png
index cfd96e35a..0aec60c81 100644
Binary files a/caravel/assets/images/viz_thumbnails/treemap.png and b/caravel/assets/images/viz_thumbnails/treemap.png differ
diff --git a/docs/gallery.rst b/docs/gallery.rst
index 27e9fcaad..86a6309b5 100644
--- a/docs/gallery.rst
+++ b/docs/gallery.rst
@@ -31,7 +31,7 @@ Gallery
 .. image:: _static/img/viz_thumbnails/pivot_table.png
    :scale: 25 %
 
-.. image:: _static/img/viz_thumbnails/force_directed.png
+.. image:: _static/img/viz_thumbnails/directed_force.png
    :scale: 25 %
 
 .. image:: _static/img/viz_thumbnails/compare.png
@@ -61,3 +61,12 @@ Gallery
 .. image:: _static/img/viz_thumbnails/para.png
    :scale: 25 %
 
+.. image:: _static/img/viz_thumbnails/iframe.png
+   :scale: 25 %
+
+.. image:: _static/img/viz_thumbnails/box_plot.png
+   :scale: 25 %
+
+.. image:: _static/img/viz_thumbnails/treemap.png
+   :scale: 25 %
+
diff --git a/docs/installation.rst b/docs/installation.rst
index 075ea2299..314e1f0ec 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -187,14 +187,13 @@ while the ``metadata_params`` get unpacked into the
 `sqlalchemy.MetaData <http://docs.sqlalchemy.org/en/rel_1_0/core/metadata.html#sqlalchemy.schema.MetaData>`_ call. Refer to the SQLAlchemy docs for more information.
 
 
-Postgres & Redshift
--------------------
+Schemas (Postgres & Redshift)
+-----------------------------
 
-Postgres and Redshift use the concept of **schema** as a logical entity
+Postgres and Redshift, as well as other database,
+use the concept of **schema** as a logical entity
 on top of the **database**. For Caravel to connect to a specific schema,
-you can either specify it in the ``metadata_params`` key of the ``extra``
-JSON blob described above, or you can use a database user name to connect to
-the database that matches the schema name you are interested it.
+there's a **schema** parameter you can set in the table form.
 
 
 SSL Access to databases
@@ -202,6 +201,7 @@ SSL Access to databases
 This example worked with a MySQL database that requires SSL. The configuration
 may differ with other backends. This is what was put in the ``extra``
 parameter ::
+
     {
         "metadata_params": {},
         "engine_params": {