diff --git a/app/scodoc/sco_placement.py b/app/scodoc/sco_placement.py
index ab9777b4..a950c215 100644
--- a/app/scodoc/sco_placement.py
+++ b/app/scodoc/sco_placement.py
@@ -89,6 +89,9 @@ def _get_group_info(evaluation_id):
         if partition != TOUS:
             has_groups = True
             nb_groups = len(groups_tree)
+        else:
+            has_groups = False
+            nb_groups = 1
     return groups_tree, has_groups, nb_groups
 
 
@@ -121,9 +124,7 @@ class PlacementForm(FlaskForm):
     )
     groups = SelectMultipleField(
         "Groupe(s)",
-        validators=[
-            wtforms.validators.DataRequired("indiquez au moins un groupe"),
-        ],
+        validators=[],
     )
     submit = SubmitField("OK")
 
@@ -131,8 +132,8 @@ class PlacementForm(FlaskForm):
         super().__init__(formdata=formdata, data=data)
         self.groups_tree = {}
         self.has_groups = None
-        self.group_tree_length = None
         self.nb_groups = None
+        self.tous_id = None
         self.set_evaluation_infos(data["evaluation_id"])
 
     def set_evaluation_infos(self, evaluation_id):
@@ -143,13 +144,20 @@ class PlacementForm(FlaskForm):
         self.groups_tree, self.has_groups, self.nb_groups = _get_group_info(
             evaluation_id
         )
-        if self.has_groups:
-            choices = []
-            for partition in self.groups_tree:
-                for groupe in self.groups_tree[partition]:
+        choices = []
+        for partition in self.groups_tree:
+            for groupe in self.groups_tree[partition]:
+                if (
+                    groupe == TOUS
+                ):  #  Affichage et valeur spécifique pour le groupe TOUS
+                    self.tous_id = str(self.groups_tree[partition][groupe])
+                    choices.append((TOUS, TOUS))
+                else:
                     groupe_id = str(self.groups_tree[partition][groupe])
                     choices.append((groupe_id, "%s (%s)" % (str(groupe), partition)))
-            self.groups.choices = choices
+        self.groups.choices = choices
+        # self.groups.default = [TOUS]  # Ne fonctionnne pas... (ni dans la déclaration de PlaceForm.groups)
+        # la réponse [] est de toute façon transposée en [ self.tous_id ] lors du traitement (cas du groupe unique)
 
 
 class _DistributeurContinu:
@@ -201,7 +209,6 @@ def placement_eval_selectetuds(evaluation_id):
                 % runner.__dict__
             )
         return runner.exec_placement()  # calcul et generation du fichier
-        # return flask.redirect(url_for("scodoc.index"))
     htmls = [
         html_sco_header.sco_header(init_jquery_ui=True),
         sco_evaluations.evaluation_describe(evaluation_id=evaluation_id),
@@ -224,7 +231,12 @@ class PlacementRunner:
         self.salle = form["salle"].data
         self.nb_rangs = form["nb_rangs"].data
         self.file_format = form["file_format"].data
-        self.groups_ids = form["groups"].data
+        if len(form["groups"].data) == 0:
+            self.groups_ids = [form.tous_id]
+        else:  # On remplace le mot-clé TOUS le l'identiant de ce groupe
+            self.groups_ids = [
+                gid if gid != TOUS else form.tous_id for gid in form["groups"].data
+            ]
         self.eval_data = sco_evaluations.do_evaluation_list(
             {"evaluation_id": self.evaluation_id}
         )[0]
@@ -504,6 +516,7 @@ class PlacementRunner:
         cells_b = [ws0.make_cell("", self.styles["2b"])]
         cells_c = [ws0.make_cell("", self.styles["2b"])]
         row = 13  # première ligne de signature
+        rang += 1
         for linetud in self.plan:
             cells_a.append(ws0.make_cell(linetud[0][0], self.styles["1t"]))  # nom
             cells_b.append(ws0.make_cell(linetud[0][1], self.styles["1m"]))  # prenom
diff --git a/app/static/css/scodoc.css b/app/static/css/scodoc.css
index a537bb96..82ada0fe 100644
--- a/app/static/css/scodoc.css
+++ b/app/static/css/scodoc.css
@@ -1094,6 +1094,8 @@ h2.formsemestre, .gtrcontent h2 {
 }
 .wtf-field li {
     display: inline;
+}.wtf-field ul {
+    padding-left: 0;
 }
 .wtf-field .errors {
     color: red ; font-weight: bold;