diff --git a/README.md b/README.md
index c7bd3fc..5f32267 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ gem 'filewatcher', '~> 0.5.3'
 
 [Docsplit](http://documentcloud.github.io/docsplit/#installation)
 ```
+sudo apt-get install imagemagick
 sudo apt-get --no-install-recommends install graphicsmagick
 sudo apt-get --no-install-recommends install poppler-data
 sudo apt-get --no-install-recommends install ghostscript
diff --git a/app/controllers/documents_controller.rb b/app/controllers/documents_controller.rb
index bedcbdf..096c45a 100644
--- a/app/controllers/documents_controller.rb
+++ b/app/controllers/documents_controller.rb
@@ -6,6 +6,8 @@ class DocumentsController < ApplicationController
   def index
     if params[:search]
       @documents = User.find(session[:user_id]).documents.contains_word(params[:search])
+    elsif params[:category]
+      @documents = User.find(session[:user_id]).documents.belongs_to_category(params[:category])
     else
       @documents = User.find(session[:user_id]).documents
     end
diff --git a/app/models/document.rb b/app/models/document.rb
index f20888e..9107288 100644
--- a/app/models/document.rb
+++ b/app/models/document.rb
@@ -6,6 +6,7 @@ class Document < ApplicationRecord
 
   has_attached_file :doc,
   {
+    styles: { thumb: ["200x", :png] },
     adapter_options: { hash_digest: Digest::SHA256 },
     url: "/system/:class/:attachment/:id_partition/:style/:hash.:extension",
     hash_secret: Rails.application.secrets.secret_key_base
@@ -15,7 +16,7 @@ class Document < ApplicationRecord
   after_save :generate_content
 
   scope :contains_word, -> (word) { joins(:content).where("text like ?", "%#{word}%") }
-
+  scope :belongs_to_category, -> (category_id) { where(category_id: category_id ) }
 
   private
     def generate_content
diff --git a/app/views/categories/index.html.erb b/app/views/categories/index.html.erb
index d28af96..d45d5b0 100644
--- a/app/views/categories/index.html.erb
+++ b/app/views/categories/index.html.erb
@@ -6,7 +6,8 @@
   <thead>
     <tr>
       <th>Name</th>
-      <th colspan="3"></th>
+      <th># documents</th>
+      <th colspan="4"></th>
     </tr>
   </thead>
 
@@ -14,7 +15,9 @@
     <% @categories.order(:name).each do |category| %>
       <tr>
         <td><%= category.get_fqcn %></td>
+        <td><%= category.documents.count %></td>
         <td><%= link_to 'Show', category %></td>
+        <td><%= link_to 'Show documents in category', documents_path(category: category.id) %></td>
         <td><%= link_to 'Edit', edit_category_path(category) %></td>
         <td><%= link_to 'Destroy', category, method: :delete, data: { confirm: 'Are you sure?' } %></td>
       </tr>
diff --git a/app/views/documents/index.html.erb b/app/views/documents/index.html.erb
index 8802042..bebb3a9 100644
--- a/app/views/documents/index.html.erb
+++ b/app/views/documents/index.html.erb
@@ -5,6 +5,7 @@
 <table>
   <thead>
     <tr>
+      <th>Category</th>
       <th>Name</th>
       <th colspan="3"></th>
     </tr>
@@ -13,6 +14,7 @@
   <tbody>
     <% @documents.each do |document| %>
       <tr>
+        <td><%= document.category.get_fqcn %></td>
         <td><%= document.name %></td>
         <td><%= link_to 'Show', document %></td>
         <td><%= link_to 'Edit', edit_document_path(document) %></td>
diff --git a/app/views/documents/show.html.erb b/app/views/documents/show.html.erb
index 0a37380..4f14c92 100644
--- a/app/views/documents/show.html.erb
+++ b/app/views/documents/show.html.erb
@@ -10,9 +10,15 @@
   <%= @document.category.get_fqcn %>
 </p>
 
-<p>
-  <%= link_to @document.doc_file_name, @document.doc.url %>
-</p>
+<% if File.exists?(@document.doc.path(:thumb)) %>
+  <p>
+    <%= link_to image_tag(@document.doc.url(:thumb), alt: 'Thumbnail of PDF'), @document.doc.url %>
+  </p>
+<% else %>
+  <p>
+    <%= link_to @document.doc_file_name, @document.doc.url %>
+  </p>
+<% end %>
 
 <% if @document.content %>
   <p>