diff --git a/resources/app/stylesheets/app.less b/resources/app/stylesheets/app.less
index 5fd66d0..05821b6 100644
--- a/resources/app/stylesheets/app.less
+++ b/resources/app/stylesheets/app.less
@@ -11,6 +11,7 @@
 
 body {
     font-family: sans-serif;
+    margin: 0;
 }
 
 a:link,
@@ -52,8 +53,7 @@ h2 {
         "nav    main   sidebar"
         "footer footer footer";
     margin: auto;
-    min-width: 900px;
-    width: 80%;
+    max-width: 1500px;
 
     nav {
         grid-area: nav;
diff --git a/src/wanijo/framework/form.clj b/src/wanijo/framework/form.clj
index 65aadfd..23405df 100644
--- a/src/wanijo/framework/form.clj
+++ b/src/wanijo/framework/form.clj
@@ -1,16 +1,19 @@
 (ns wanijo.framework.form
   (:require [clojure.spec.alpha :as spec]
             [hiccup.form :as hform]
+            [hiccup.core :as hcore]
             [wanijo.framework.view :as view]
-            [ring.util.anti-forgery :refer [anti-forgery-field]]))
+            [ring.util.anti-forgery :refer [anti-forgery-field]]
+            [wanijo.framework.common :refer [in?]]))
 
 (spec/def ::label string?)
 (spec/def ::required boolean?)
 (spec/def ::spec keyword?)
 (spec/def ::options
-  (spec/coll-of (spec/tuple string? string?)))
+  (spec/or :empty empty?
+           :options (spec/coll-of (spec/tuple string? string?))))
 (spec/def ::widget
-  #(some (partial = %) [:input :select :checkbox :textarea]))
+  #(in? [:input :select :checkbox :textarea :mselect] %))
 (spec/def ::field
   (spec/keys :req-un [::label
                       ::required
@@ -18,11 +21,7 @@
              :opt-un [::options
                       ::widget]))
 (spec/def ::fields
-  (spec/and map?
-            (fn [map]
-              (every? #(spec/valid? ::field (val %)) map))
-            (fn [map]
-              (every? #(keyword? (key %)) map))))
+  (spec/map-of keyword? ::field))
 (spec/def ::form
   (spec/keys :req-un [::fields]))
 
@@ -111,14 +110,31 @@
                     options
                     (if validate? req-value value))))
 
+(defn render-multiselect [id {:keys [label spec options]} value req-value validate?]
+  (list
+   (when (and validate? (not (spec/valid? spec req-value)))
+     (spec-to-errmsg label spec value))
+   (hform/label id label)
+   (hcore/html
+    [:select {:multiple "multiple"
+              :size 5
+              :name (name id)
+              :id (name id)}
+     (for [option options]
+       [:option {:value (second option)
+                 :selected (in? (if validate? req-value value)
+                                (second option))}
+        (first option)])])))
+
 (def render-mapping
   {:input render-input
    :checkbox render-checkbox
    :textarea render-textarea
-   :select render-select})
+   :select render-select
+   :mselect render-multiselect})
 
 (defn render-widgets [form-def values req]
-  {:pre [(spec/valid? ::form form-def)]}
+  {:pre [(spec/assert ::form form-def)]}
   (let [form-hash (str (hash [form-def values]))
         submitted-hash (get-in req [:params :__form-hash])
         validate? (= form-hash submitted-hash)]
diff --git a/src/wanijo/schema/domain.clj b/src/wanijo/schema/domain.clj
index 4ce2835..bcaf82a 100644
--- a/src/wanijo/schema/domain.clj
+++ b/src/wanijo/schema/domain.clj
@@ -8,6 +8,9 @@
 (spec/def ::created-at
   (spec/and string? ::neo4j/date-str))
 
+(spec/def ::assigned-to
+  (complement empty?))
+
 (neo4j/defquery
   all-created-by
   "MATCH (s:schema)-->(u:user)
@@ -110,3 +113,16 @@
   (neo4j/exec-query!
    edit
    schema))
+
+(neo4j/defquery
+  assigned-users
+  "MATCH (s:schema)-[:assigned_to]-(u:user)
+   WHERE s.uuid = {uuid}
+   RETURN u
+   ORDER BY u.ident")
+
+(defn assigned-users! [uuid]
+  (map :u
+       (neo4j/exec-query!
+        assigned-users
+        {:uuid uuid})))
diff --git a/src/wanijo/schema/routes.clj b/src/wanijo/schema/routes.clj
index 89d18ed..3bc58f7 100644
--- a/src/wanijo/schema/routes.clj
+++ b/src/wanijo/schema/routes.clj
@@ -5,6 +5,7 @@
             [wanijo.framework.form :as form]
             [wanijo.framework.routing :refer [register! path]]
             [wanijo.schema.domain :as domain]
+            [wanijo.user.domain :as domain-user]
             [wanijo.schema.view :as view-schema]
             [wanijo.attribute.domain :as domain-attr]))
 
@@ -35,22 +36,36 @@
       (resp/redirect (path :schema-overview)))
     {:status 403}))
 
+(defn view! [uuid req]
+  (view-schema/show-schema!
+   (assoc (domain/find-by-uuid! uuid)
+          :assigned (map :uuid (domain/assigned-users! uuid)))
+   (domain-attr/find-by-schema! uuid)
+   (assoc-in view-schema/access-form
+             [:fields :assigned :options]
+             (map #(vector (:ident %) (:uuid %))
+                  (domain-user/all!)))
+   req))
+
+(defn assign! [req]
+  (println (:params req)))
+
 (defroutes routes
   (GET (register! :schema-overview "/schema")
        []
        view-schema/overview!)
   (GET (register! :schema-show "/schema/:uuid")
        [uuid :as req]
-       (view-schema/show-schema!
-        (domain/find-by-uuid! uuid)
-        (domain-attr/find-by-schema! uuid)
-        req))
+       (view! uuid req))
   (POST (register! :schema-new "/schema/new")
         []
         new!)
   (POST (register! :schema-edit "/schema/edit")
         []
         edit!)
+  (POST (register! :schema-assign "/schema/assign")
+        []
+        assign!)
   (DELETE (register! :schema-delete "/schema/:uuid")
           [uuid :as req]
           (delete-schema! uuid (:session req))))
diff --git a/src/wanijo/schema/view.clj b/src/wanijo/schema/view.clj
index e552733..b5ae050 100644
--- a/src/wanijo/schema/view.clj
+++ b/src/wanijo/schema/view.clj
@@ -10,8 +10,8 @@
 
 (def form
   {:fields {:name {:label "Name"
-                          :required true
-                          :spec ::domain/name}}})
+                   :required true
+                   :spec ::domain/name}}})
 
 (def attr-form
   {:fields {:name {:label "Name"
@@ -29,6 +29,12 @@
                        :spec ::attr-domain/required
                        :widget :checkbox}}})
 
+(def access-form
+  {:fields {:assigned {:label "Users"
+                       :required false
+                       :spec :a
+                       :widget :mselect}}})
+
 (defn overview! [req]
   (let [session (:session req)
         uuid (:uuid session)
@@ -55,7 +61,8 @@
                      (form/render-widgets form {} req)
                      (hform/submit-button "Create"))])))
 
-(defn show-schema! [schema attrs req]
+(defn show-schema! [schema attrs access-form req]
+  (println access-form)
   (view/layout!
    :session (:session req)
    :content
@@ -65,7 +72,12 @@
     (hform/form-to [:post (path :schema-edit)]
                    (form/render-widgets form schema req)
                    (hform/hidden-field "uuid" (:uuid schema))
-                   (hform/submit-button "Save"))
+                   (hform/submit-button "Edit"))
+    [:h2 "Assign to users"]
+    (hform/form-to [:post (path :schema-assign)]
+                   (form/render-widgets access-form schema req)
+                   (hform/hidden-field "uuid" (:uuid schema))
+                   (hform/submit-button "Assign"))
     [:h2 "Attributes"]
     [:ul.schema-attributes
      (for [attr attrs]
@@ -83,7 +95,7 @@
     (hform/form-to [:post (path :attribute-new)]
                    (form/render-widgets attr-form {} req)
                    (hform/hidden-field "schema" (:uuid schema))
-                   (hform/submit-button "Save"))
+                   (hform/submit-button "Create"))
     [:h2 "Actions"]
     (hform/form-to {:class "inline"}
                    [:delete (path :schema-delete schema)]
diff --git a/src/wanijo/user/domain.clj b/src/wanijo/user/domain.clj
index 44753f1..dac4ef9 100644
--- a/src/wanijo/user/domain.clj
+++ b/src/wanijo/user/domain.clj
@@ -23,3 +23,15 @@
     {:ident ident})
    first
    :n))
+
+(neo4j/defquery
+  all
+  "MATCH (u:user)
+   RETURN u
+   ORDER BY u.ident")
+
+(defn all! []
+  (map :u
+       (neo4j/exec-query!
+        all
+        {})))