diff --git a/app/controllers/users/commencer_controller.rb b/app/controllers/users/commencer_controller.rb
index 63e7dacdd..d70f5facd 100644
--- a/app/controllers/users/commencer_controller.rb
+++ b/app/controllers/users/commencer_controller.rb
@@ -1,6 +1,6 @@
 module Users
   class CommencerController < ApplicationController
-    layout 'procedure_context'
+    layout 'procedure_context_full_screen'
 
     def commencer
       @procedure = retrieve_procedure
diff --git a/app/controllers/users/dossiers_controller.rb b/app/controllers/users/dossiers_controller.rb
index 8f396dad3..5068478ea 100644
--- a/app/controllers/users/dossiers_controller.rb
+++ b/app/controllers/users/dossiers_controller.rb
@@ -92,12 +92,10 @@ module Users
     def identite
       @dossier = dossier
       @user = current_user
-      @hide_description = true
     end
 
     def update_identite
       @dossier = dossier
-      @hide_description = true
 
       if @dossier.individual.update(individual_params)
         @dossier.update!(autorisation_donnees: true, identity_updated_at: Time.zone.now)
@@ -112,12 +110,10 @@ module Users
 
     def siret
       @dossier = dossier
-      @hide_description = true
     end
 
     def update_siret
       @dossier = dossier
-      @hide_description = true
 
       # We use the user as the holder model object for the siret value
       # (so that we can restore it on the form in case of error).
diff --git a/app/views/administrateurs/procedures/_informations.html.haml b/app/views/administrateurs/procedures/_informations.html.haml
index d451f421e..e15874281 100644
--- a/app/views/administrateurs/procedures/_informations.html.haml
+++ b/app/views/administrateurs/procedures/_informations.html.haml
@@ -6,7 +6,7 @@
 = f.label :libelle do
   Titre de la démarche
   %span.mandatory *
-= f.text_field :libelle, class: 'form-control', placeholder: 'Titre'
+= f.text_field :libelle, class: 'form-control', placeholder: 'Titre', required: true
 
 = f.label :description_what do
   Quel est l’objet de la démarche ?
diff --git a/app/views/administrateurs/procedures/edit.html.haml b/app/views/administrateurs/procedures/edit.html.haml
index 7571094af..1e1b66792 100644
--- a/app/views/administrateurs/procedures/edit.html.haml
+++ b/app/views/administrateurs/procedures/edit.html.haml
@@ -25,4 +25,4 @@
       .procedure-form__preview.sticky--top
         %h3.procedure-form__preview-title Aperçu
         .procedure-preview
-          = render partial: 'shared/procedure_description', locals: { procedure: @procedure }
+          = render partial: 'shared/procedure_description', locals: { procedure: @procedure, full_screen_display: false }
diff --git a/app/views/administrateurs/procedures/new.html.haml b/app/views/administrateurs/procedures/new.html.haml
index 99b375169..aae964bc0 100644
--- a/app/views/administrateurs/procedures/new.html.haml
+++ b/app/views/administrateurs/procedures/new.html.haml
@@ -25,4 +25,4 @@
       .procedure-form__preview.sticky--top
         %h3.procedure-form__preview-title Aperçu
         .procedure-preview
-          = render partial: 'shared/procedure_description', locals: { procedure: @procedure }
+          = render partial: 'shared/procedure_description', locals: { procedure: @procedure, full_screen_display: false }
diff --git a/app/views/commencer/show.html.haml b/app/views/commencer/show.html.haml
index 4bf80acdb..1cae0d8d3 100644
--- a/app/views/commencer/show.html.haml
+++ b/app/views/commencer/show.html.haml
@@ -2,7 +2,7 @@
 
 .commencer.form
   - if !user_signed_in?
-    = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.start_procedure")) do |c|
+    = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.start_procedure"), heading_level: 'h2') do |c|
       - c.body do
         = render partial: 'shared/france_connect_login', locals: { url: commencer_france_connect_path(path: @procedure.path, prefill_token: @prefilled_dossier&.prefill_token) }
         = link_to commencer_sign_up_path(path: @procedure.path, prefill_token: @prefilled_dossier&.prefill_token), class: 'fr-btn fr-mb-2w fr-mr-2w' do
@@ -18,7 +18,7 @@
     - not_drafts = dossiers.merge(Dossier.state_not_brouillon)
 
     - if @prefilled_dossier
-      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.prefilled_draft")) do |c|
+      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.prefilled_draft"), heading_level: 'h2') do |c|
         - c.body do
           %p= t('views.commencer.show.prefilled_draft_detail_html', time_ago: time_ago_in_words(@prefilled_dossier.created_at), procedure: @procedure.libelle)
           = link_to t('views.commencer.show.go_to_prefilled_file'), url_for_dossier(@prefilled_dossier), class: 'fr-btn fr-mb-2w'
@@ -28,7 +28,7 @@
 
     - elsif drafts.size == 1 && not_drafts.empty?
       - dossier = drafts.first
-      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.already_draft")) do |c|
+      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.already_draft"), heading_level: 'h2') do |c|
         - c.body do
           %p
             = t('views.commencer.show.already_draft_detail_html', time_ago: time_ago_in_words(dossier.created_at), procedure: dossier.procedure.libelle)
@@ -37,7 +37,7 @@
 
     - elsif not_drafts.size == 1
       - dossier = not_drafts.first
-      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.already_not_draft")) do |c|
+      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.already_not_draft"), heading_level: 'h2') do |c|
         - c.body do
           %p
             = t('views.commencer.show.already_not_draft_detail_html', time_ago: time_ago_in_words(dossier.depose_at), procedure: dossier.procedure.libelle)
@@ -45,7 +45,7 @@
           = link_to t('views.commencer.show.start_new_file'), url_for_new_dossier(@revision), class: 'fr-btn fr-btn--secondary fr-mb-2w'
 
     - else
-      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.existing_dossiers")) do |c|
+      = render Dsfr::CalloutComponent.new(title: t("views.commencer.show.existing_dossiers"), heading_level: 'h2') do |c|
         - c.body do
           = link_to t('views.commencer.show.show_dossiers'), dossiers_path, class: "fr-btn fr-mb-2w"
           = link_to t('views.commencer.show.start_new_file'), url_for_new_dossier(@revision), class: "fr-btn fr-btn--secondary fr-mb-2w"
diff --git a/app/views/layouts/procedure_context.html.haml b/app/views/layouts/procedure_context.html.haml
index 74b6bc0d8..474828a85 100644
--- a/app/views/layouts/procedure_context.html.haml
+++ b/app/views/layouts/procedure_context.html.haml
@@ -1,15 +1,17 @@
 - procedure = @procedure || @dossier&.procedure || nil
 
 - content_for :content do
-  .fr-container.fr-mt-5w
-    .fr-grid-row
-      .fr-col-12.fr-col-md-8.fr-col-offset-md-2
-        .procedure-preview.fr-mb-5w
-          - if procedure
-            = render partial: 'shared/procedure_description', locals: { procedure: procedure }
-          - else
-            = render partial: 'layouts/commencer/no_procedure'
-            = yield
+  .two-columns.procedure-context
+    .columns-container
+
+      .column.procedure-preview
+        - if procedure
+          = render partial: 'shared/procedure_description', locals: { procedure: procedure, full_screen_display: false }
+        - else
+          = render partial: 'layouts/commencer/no_procedure'
+
+      .column.procedure-context-content
+        = yield
 
 - content_for :footer do
   - if procedure
diff --git a/app/views/layouts/procedure_context_full_screen.html.haml b/app/views/layouts/procedure_context_full_screen.html.haml
new file mode 100644
index 000000000..f7f2b36fb
--- /dev/null
+++ b/app/views/layouts/procedure_context_full_screen.html.haml
@@ -0,0 +1,20 @@
+- procedure = @procedure || @dossier&.procedure || nil
+
+- content_for :content do
+  .fr-container.fr-mt-5w
+    .fr-grid-row
+      .fr-col-12.fr-col-md-8.fr-col-offset-md-2
+        .procedure-preview.fr-mb-5w
+          - if procedure
+            = render partial: 'shared/procedure_description', locals: { procedure: procedure, full_screen_display: true }
+          - else
+            = render partial: 'layouts/commencer/no_procedure'
+            = yield
+
+- content_for :footer do
+  - if procedure
+    = render partial: 'users/procedure_footer', locals: { procedure: procedure, dossier: @dossier }
+  - else
+    = render partial: 'users/dossiers/index_footer'
+
+= render template: 'layouts/application'
diff --git a/app/views/prefill_descriptions/edit.html.haml b/app/views/prefill_descriptions/edit.html.haml
index 4c94fabf7..8514ed493 100644
--- a/app/views/prefill_descriptions/edit.html.haml
+++ b/app/views/prefill_descriptions/edit.html.haml
@@ -7,7 +7,7 @@
   .two-columns.procedure-context
     .columns-container
       .column.procedure-preview
-        = render partial: 'shared/procedure_description', locals: { procedure: @prefill_description }
+        = render partial: 'shared/procedure_description', locals: { procedure: @prefill_description, full_screen_display: false }
       .column.procedure-context-content
         %p
           = t("views.prefill_descriptions.edit.intro_html", libelle: @prefill_description.libelle)
diff --git a/app/views/shared/_procedure_description.html.haml b/app/views/shared/_procedure_description.html.haml
index c5b799a19..23ebfb3e4 100644
--- a/app/views/shared/_procedure_description.html.haml
+++ b/app/views/shared/_procedure_description.html.haml
@@ -3,7 +3,6 @@
   - if procedure.service.present?
     - procedure_logo_alt = "#{procedure.service.nom} − #{procedure.service.organisme}"
   = image_tag procedure.logo_url, alt: procedure_logo_alt
-
   - if procedure.euro_flag
     = image_tag("flag_of_europe.svg", id: 'euro_flag', class: (!procedure.euro_flag ? "hidden" : ""))
 %h1.procedure-title.fr-h2
@@ -13,10 +12,10 @@
   %p
     %small
       %span.fr-icon-timer-line
-
       = t('shared.procedure_description.estimated_fill_duration', estimated_minutes: estimated_fill_duration_minutes(procedure))
 
-= yield
+- if full_screen_display
+  = yield
 
 - if procedure.auto_archive_on
   %details.procedure-configuration--auto-archive
@@ -26,23 +25,23 @@
       %span.procedure-auto-archive-title Date limite : #{procedure_auto_archive_date(procedure)}
     %p Vous pouvez déposer vos dossiers jusqu’au #{procedure_auto_archive_datetime(procedure)}.
 
-- if !@hide_description
-  - if procedure.description.present?
-    .procedure-description
-      .procedure-description-body.read-more-enabled.read-more-collapsed{ tabindex: "0", role: "region", "aria-label": t('views.users.dossiers.identite.description') }
-        = h render SimpleFormatComponent.new(procedure.description, allow_a: true)
-      = button_tag "Afficher la description complète", class: 'button read-more-button'
 
-  - else
-    .fr-accordions-group
-      %section.fr-accordion
-        %h3.fr-accordion__title
-          %button.fr-accordion__btn{ "aria-controls" => "accordion-114", "aria-expanded" => "true" } Quel est l’objet de cette démarche ?
-        #accordion-114.fr-collapse.js_description_what
-          = h render SimpleFormatComponent.new(procedure.description_what, allow_a: true)
+- if procedure.description_what.present? && procedure.description_for_who.present?
+  .fr-accordions-group
+    %section.fr-accordion
+      %h3.fr-accordion__title
+        %button.fr-accordion__btn{ "aria-controls" => "accordion-114", "aria-expanded" => "true" } Quel est l’objet de cette démarche ?
+      #accordion-114.fr-collapse.js_description_what
+        = h render SimpleFormatComponent.new(procedure.description_what, allow_a: true)
 
-      %section.fr-accordion
-        %h3.fr-accordion__title
-          %button.fr-accordion__btn{ "aria-controls" => "accordion-115", "aria-expanded" => "false" } À qui s’adresse la démarche ?
-        #accordion-115.fr-collapse.js_description_for_who
-          = h render SimpleFormatComponent.new(procedure.description_for_who, allow_a: true)
+    %section.fr-accordion
+      %h3.fr-accordion__title
+        %button.fr-accordion__btn{ "aria-controls" => "accordion-115", "aria-expanded" => "false" } À qui s’adresse la démarche ?
+      #accordion-115.fr-collapse.js_description_for_who
+        = h render SimpleFormatComponent.new(procedure.description_for_who, allow_a: true)
+
+- else
+  .procedure-description
+    .procedure-description-body.read-more-enabled.read-more-collapsed{ tabindex: "0", role: "region", "aria-label": t('views.users.dossiers.identite.description') }
+      = h render SimpleFormatComponent.new(procedure.description, allow_a: true)
+    = button_tag "Afficher la description complète", class: 'button read-more-button'
diff --git a/spec/support/feature_matchers.rb b/spec/support/feature_matchers.rb
index cf771367f..b61c8beee 100644
--- a/spec/support/feature_matchers.rb
+++ b/spec/support/feature_matchers.rb
@@ -5,9 +5,5 @@ module Capybara
     def has_procedure_description?(procedure)
       has_content?(procedure.libelle) && has_content?(procedure.description) && has_content?(procedure.service.email)
     end
-
-    def has_procedure_sumup_description?(procedure)
-      has_content?(procedure.libelle) && has_content?(procedure.service.email)
-    end
   end
 end
diff --git a/spec/system/administrateurs/procedure_spec_helper.rb b/spec/system/administrateurs/procedure_spec_helper.rb
index 134e93ec9..72db34d66 100644
--- a/spec/system/administrateurs/procedure_spec_helper.rb
+++ b/spec/system/administrateurs/procedure_spec_helper.rb
@@ -1,7 +1,8 @@
 module ProcedureSpecHelper
   def fill_in_dummy_procedure_details(fill_path: true)
     fill_in 'procedure_libelle', with: 'libelle de la procedure'
-    fill_in 'procedure_description', with: 'description de la procedure'
+    fill_in 'procedure_description_what', with: "description de l'objet de la procedure"
+    fill_in 'procedure_description_for_who', with: "description d'à qui s'adresse la procedure"
     fill_in 'procedure_cadre_juridique', with: 'cadre juridique'
     fill_in 'procedure_duree_conservation_dossiers_dans_ds', with: '3'
   end
diff --git a/spec/system/sessions/sign_in_spec.rb b/spec/system/sessions/sign_in_spec.rb
index 4057b6f77..c5679805c 100644
--- a/spec/system/sessions/sign_in_spec.rb
+++ b/spec/system/sessions/sign_in_spec.rb
@@ -43,7 +43,7 @@ describe 'Signin in:' do
       click_on 'Commencer la démarche'
 
       expect(page).to have_current_path identite_dossier_path(user.reload.dossiers.last)
-      expect(page).to have_procedure_sumup_description(procedure)
+      expect(page).to have_procedure_description(procedure)
       expect(page).to have_content "Données d’identité"
     end
   end
diff --git a/spec/system/users/sign_up_spec.rb b/spec/system/users/sign_up_spec.rb
index d6f431d8a..9c77cfbac 100644
--- a/spec/system/users/sign_up_spec.rb
+++ b/spec/system/users/sign_up_spec.rb
@@ -84,7 +84,7 @@ describe 'Signing up:' do
       click_on 'Commencer la démarche'
 
       expect(page).to have_current_path identite_dossier_path(procedure.reload.dossiers.last)
-      expect(page).to have_procedure_sumup_description(procedure)
+      expect(page).to have_procedure_description(procedure)
     end
   end
 
diff --git a/spec/views/shared/_procedure_description.html.haml_spec.rb b/spec/views/shared/_procedure_description.html.haml_spec.rb
index 431de7fe3..9ced93cc9 100644
--- a/spec/views/shared/_procedure_description.html.haml_spec.rb
+++ b/spec/views/shared/_procedure_description.html.haml_spec.rb
@@ -2,7 +2,7 @@ describe 'shared/_procedure_description', type: :view do
   let(:estimated_duration_visible) { true }
   let(:procedure) { create(:procedure, :published, :with_service, estimated_duration_visible:) }
 
-  subject { render partial: 'shared/procedure_description', locals: { procedure: procedure } }
+  subject { render partial: 'shared/procedure_description', locals: { procedure: procedure, full_screen_display: false } }
 
   it 'renders the view' do
     subject