diff --git a/app/assets/stylesheets/new_design/_colors.scss b/app/assets/stylesheets/new_design/_colors.scss
index c46c85b3def..059b41ef174 100644
--- a/app/assets/stylesheets/new_design/_colors.scss
+++ b/app/assets/stylesheets/new_design/_colors.scss
@@ -12,3 +12,4 @@ $lighter-green: lighten($green, 30%);
 $light-green: lighten($green, 25%);
 $dark-green: darken($green, 20%);
 $orange: #F59415;
+$orange-bg: lighten($orange, 35%);
diff --git a/app/assets/stylesheets/new_design/dossier_champs.scss b/app/assets/stylesheets/new_design/dossier_champs.scss
index 7b663274c6c..fd8183ca632 100644
--- a/app/assets/stylesheets/new_design/dossier_champs.scss
+++ b/app/assets/stylesheets/new_design/dossier_champs.scss
@@ -1,6 +1,7 @@
+@import "colors";
 @import "constants";
 
-.dossier-champs {
+table.dossier-champs {
   th,
   td {
     vertical-align: top;
@@ -9,4 +10,16 @@
   .libelle {
     width: 250px;
   }
+
+  td.updated-at {
+    visibility: hidden;
+    font-size: 13px;
+    color: $grey;
+    text-align: right;
+    width: 190px;
+  }
+
+  tr:hover .updated-at {
+    visibility: visible;
+  }
 }
diff --git a/app/assets/stylesheets/new_design/utils.scss b/app/assets/stylesheets/new_design/utils.scss
index 599609dd538..44d53176c28 100644
--- a/app/assets/stylesheets/new_design/utils.scss
+++ b/app/assets/stylesheets/new_design/utils.scss
@@ -1,3 +1,5 @@
+@import "colors";
+
 .pull-left {
   float: left;
 }
@@ -32,3 +34,8 @@
   text-align: center;
   margin: 60px 0;
 }
+
+.highlighted {
+  background: $orange-bg;
+  color: $black;
+}
diff --git a/app/controllers/new_gestionnaire/dossiers_controller.rb b/app/controllers/new_gestionnaire/dossiers_controller.rb
index 937b0797114..702805a18fe 100644
--- a/app/controllers/new_gestionnaire/dossiers_controller.rb
+++ b/app/controllers/new_gestionnaire/dossiers_controller.rb
@@ -3,13 +3,14 @@ class DossiersController < ProceduresController
     include ActionView::Helpers::NumberHelper
     include ActionView::Helpers::TextHelper
 
+    after_action :mark_demande_as_read, only: :show
+
     def attestation
       send_data(dossier.attestation.pdf.read, filename: 'attestation.pdf', type: 'application/pdf')
     end
 
     def show
-      dossier.notifications.demande.mark_as_read
-      current_gestionnaire.mark_tab_as_seen(dossier, :demande)
+      @follow = current_gestionnaire.follows.find_by(dossier: dossier)
     end
 
     def messagerie
@@ -192,5 +193,10 @@ def check_attestation_emailable
 
       dossier&.attestation&.emailable?
     end
+
+    def mark_demande_as_read
+      dossier.notifications.demande.mark_as_read
+      current_gestionnaire.mark_tab_as_seen(dossier, :demande)
+    end
   end
 end
diff --git a/app/helpers/dossier_helper.rb b/app/helpers/dossier_helper.rb
index aade090280f..0291078c5df 100644
--- a/app/helpers/dossier_helper.rb
+++ b/app/helpers/dossier_helper.rb
@@ -8,4 +8,10 @@ def button_or_label_class(dossier)
       'refused'
     end
   end
+
+  def updated_at_bg_class(seen_at, updated_at)
+    if seen_at&.<(updated_at)
+      "highlighted"
+    end
+  end
 end
diff --git a/app/models/follow.rb b/app/models/follow.rb
index 2df639902f5..ea18f9e0ff3 100644
--- a/app/models/follow.rb
+++ b/app/models/follow.rb
@@ -9,9 +9,9 @@ class Follow < ActiveRecord::Base
   private
 
   def set_default_date
-    self.demande_seen_at = DateTime.now
-    self.annotations_privees_seen_at = DateTime.now
-    self.avis_seen_at = DateTime.now
-    self.messagerie_seen_at = DateTime.now
+    self.demande_seen_at ||= DateTime.now
+    self.annotations_privees_seen_at ||= DateTime.now
+    self.avis_seen_at ||= DateTime.now
+    self.messagerie_seen_at ||= DateTime.now
   end
 end
diff --git a/app/views/new_gestionnaire/avis/show.html.haml b/app/views/new_gestionnaire/avis/show.html.haml
index cb8994db3a6..a267a12ea25 100644
--- a/app/views/new_gestionnaire/avis/show.html.haml
+++ b/app/views/new_gestionnaire/avis/show.html.haml
@@ -16,7 +16,7 @@
     - champs = @dossier.ordered_champs.decorate
     - if champs.any?
       .card
-        = render partial: 'new_gestionnaire/dossiers/champs', locals: { champs: champs }
+        = render partial: 'new_gestionnaire/dossiers/champs', locals: { champs: champs, dossier: @dossier, follow: nil }
 
     - if @dossier.procedure.use_api_carto
       .accompagnateur-title Cartographie
diff --git a/app/views/new_gestionnaire/dossiers/_champs.html.haml b/app/views/new_gestionnaire/dossiers/_champs.html.haml
index 7d71293305e..1cf25b14528 100644
--- a/app/views/new_gestionnaire/dossiers/_champs.html.haml
+++ b/app/views/new_gestionnaire/dossiers/_champs.html.haml
@@ -4,7 +4,7 @@
       %tr
         - case c.type_champ
         - when "header_section"
-          %th.header-section{ colspan: 2 }
+          %th.header-section{ colspan: 3 }
             = c.libelle
         - when "multiple_drop_down_list"
           %th.libelle
@@ -30,4 +30,10 @@
           %th.libelle
             = "#{c.libelle} :"
           %td.rich-text
-            = sanitize(c.value)
+            %span{ class: updated_at_bg_class(follow&.demande_seen_at, c.updated_at) }
+              = sanitize(c.value)
+        - if c.type_champ != "header_section"
+          %td.updated-at
+            %span{ class: updated_at_bg_class(follow&.demande_seen_at, c.updated_at) }
+              modifié le
+              = c.updated_at.strftime("%d/%m/%Y à %H:%M")
diff --git a/app/views/new_gestionnaire/dossiers/print.html.haml b/app/views/new_gestionnaire/dossiers/print.html.haml
index d557a198e33..1f4d1025a4a 100644
--- a/app/views/new_gestionnaire/dossiers/print.html.haml
+++ b/app/views/new_gestionnaire/dossiers/print.html.haml
@@ -13,7 +13,7 @@
 
 - champs = @dossier.ordered_champs.decorate
 - if champs.any?
-  = render partial: "champs", locals: { champs: champs }
+  = render partial: "champs", locals: { champs: champs, dossier: @dossier }
 
 - if @dossier.procedure.use_api_carto
   %h3 Cartographie
diff --git a/app/views/new_gestionnaire/dossiers/show.html.haml b/app/views/new_gestionnaire/dossiers/show.html.haml
index 0519f69f533..7fcb3c32410 100644
--- a/app/views/new_gestionnaire/dossiers/show.html.haml
+++ b/app/views/new_gestionnaire/dossiers/show.html.haml
@@ -15,7 +15,7 @@
   - champs = @dossier.ordered_champs.includes(:type_de_champ).decorate
   - if champs.any?
     .card
-      = render partial: "champs", locals: { champs: champs }
+      = render partial: "champs", locals: { champs: champs, dossier: @dossier, follow: @follow }
 
   - if @dossier.procedure.use_api_carto
     .accompagnateur-title Cartographie
diff --git a/spec/views/new_gestionnaire/dossiers/_champs.html.haml_spec.rb b/spec/views/new_gestionnaire/dossiers/_champs.html.haml_spec.rb
index 3ad9c9cb95a..a3ddc9f1db3 100644
--- a/spec/views/new_gestionnaire/dossiers/_champs.html.haml_spec.rb
+++ b/spec/views/new_gestionnaire/dossiers/_champs.html.haml_spec.rb
@@ -1,31 +1,47 @@
 describe 'new_gestionnaire/dossiers/champs.html.haml', type: :view do
-  before { render 'new_gestionnaire/dossiers/champs.html.haml', champs: champs }
+  before { view.extend DossierHelper }
 
-  context "there are some champs" do
-    let(:dossier) { create(:dossier) }
-    let(:champ1) { create(:champ, :checkbox, value: "true") }
-    let(:champ2) { create(:champ, :header_section, value: "Section") }
-    let(:champ3) { create(:champ, :explication, value: "mazette") }
-    let(:champ4) { create(:champ, :dossier_link, value: dossier.id) }
-    let(:champs) { [champ1, champ2, champ3, champ4] }
+  subject { render 'new_gestionnaire/dossiers/champs.html.haml', champs: champs, dossier: dossier, follow: follow }
+
+  let(:dossier) { create(:dossier) }
+  let(:champ1) { create(:champ, :checkbox, value: "true") }
+  let(:champ2) { create(:champ, :header_section, value: "Section") }
+  let(:champ3) { create(:champ, :explication, value: "mazette") }
+  let(:champ4) { create(:champ, :dossier_link, value: dossier.id) }
+  let(:champs) { [champ1, champ2, champ3, champ4] }
+  let(:seen_at) { champ1.updated_at + 1.hour }
+  let(:follow) { create(:follow, gestionnaire: create(:gestionnaire), dossier: dossier, demande_seen_at: seen_at) }
 
-    it { expect(rendered).to include(champ1.libelle) }
-    it { expect(rendered).to include(champ1.value) }
+  context "there are some champs" do
+    it { is_expected.to include(champ1.libelle) }
+    it { is_expected.to include(champ1.value) }
 
-    it { expect(rendered).to have_css(".header-section") }
-    it { expect(rendered).to include(champ2.libelle) }
+    it { is_expected.to have_css(".header-section") }
+    it { is_expected.to include(champ2.libelle) }
 
-    it { expect(rendered).not_to include(champ3.libelle) }
-    it { expect(rendered).not_to include(champ3.value) }
+    it { is_expected.not_to include(champ3.libelle) }
+    it { is_expected.not_to include(champ3.value) }
 
-    it { expect(rendered).to have_link("Dossier nº #{dossier.id}") }
-    it { expect(rendered).to include(dossier.text_summary) }
+    it { is_expected.to have_link("Dossier nº #{dossier.id}") }
+    it { is_expected.to include(dossier.text_summary) }
   end
 
   context "with a dossier_link champ but without value" do
     let(:champ) { create(:champ, :dossier_link, value: nil) }
     let(:champs) { [champ] }
 
-    it { expect(rendered).to include("Pas de dossier associé") }
+    it { is_expected.to include("Pas de dossier associé") }
+  end
+
+  context "with a seen_at after champ updated_at" do
+    let(:seen_at) { champ1.updated_at + 1.hour }
+
+    it { is_expected.not_to have_css(".highlighted") }
+  end
+
+  context "with a seen_at after champ updated_at" do
+    let(:seen_at) { champ1.updated_at - 1.hour }
+
+    it { is_expected.to have_css(".highlighted") }
   end
 end
diff --git a/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb b/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb
index 68ad70c78f3..966912d4fbc 100644
--- a/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb
+++ b/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb
@@ -1,4 +1,6 @@
 describe 'new_gestionnaire/dossiers/show.html.haml', type: :view do
+  before { view.extend DossierHelper }
+
   let(:current_gestionnaire) { create(:gestionnaire) }
   let(:individual) { nil }
   let(:entreprise) { nil }