diff --git a/app/static/css/table_editor.css b/app/static/css/table_editor.css
index 04faa9434..d3fe5a0f3 100644
--- a/app/static/css/table_editor.css
+++ b/app/static/css/table_editor.css
@@ -7,87 +7,53 @@ body {
 /***************************/
 /* Le tableau              */
 /***************************/
-.tableau {
+.tableau{
     display: grid;
     grid-auto-rows: minmax(24px, auto);
+    gap: 2px;
 }
-
-.entete {
+.entete{
     background: #09c;
     font-weight: bold;
 }
-
-.tableau>div {
-    padding: 4px;
+.tableau>div{
+    padding: 4px 8px;
+    border-radius: 4px;
     border: 1px solid #999;
     grid-column: var(--x) / span var(--nbX);
     grid-row: var(--y) / span var(--nbY);
 }
 
-/***************************/
-/* Attente                 */
-/***************************/
-.wait {
-    position: fixed;
-    top: 32px;
-    left: 50%;
-    height: 4px;
-    width: 32px;
-    margin-left: -16px;
-    background: #424242;
-    animation: attente 0.4s infinite alternate;
-    display: none;
-}
-
-.go {
-    display: block;
-}
-
-@keyframes attente {
-    100% {
-        transform: translateY(-16px) rotate(360deg);
-    }
-}
-
-/***************************/
-/* Système de modification */
-/***************************/
-.modifOnOff {
-    position: relative;
-    display: table;
-    margin: 16px;
-    padding-right: 8px;
+[data-editable="true"]{
     cursor: pointer;
 }
 
-.modifOnOff::before {
-    content: '';
-    width: 40px;
-    height: 20px;
-    background: #c90;
-    position: absolute;
-    top: 0;
-    left: 100%;
-    border-radius: 20px;
-    transition: 0.2s;
-}
+/***************************/
+/* Statut des cellules     */
+/***************************/
+.selected{	outline: 1px solid #c09; }
+.modifying{	outline: 2px dashed #c09; }
+.wait{		outline: 2px solid #c90; }
+.good{		outline: 2px solid #9c0; }
 
-.modifOnOff::after {
-    content: '';
-    width: 16px;
-    height: 16px;
-    background: #FFF;
-    position: absolute;
-    top: 2px;
-    left: calc(100% + 2px);
-    border-radius: 100%;
-    transition: 0.2s;
+/***************************/
+/* Message                 */
+/***************************/
+.message{
+    position: fixed;
+    bottom: 100%;
+    left: 50%;
+    z-index: 10;
+    padding: 20px;
+    border-radius: 0 0 10px 10px;
+    background: #ec7068;
+    background: #90c;
+    color: #FFF;
+    font-size: 24px;
+    animation: message 3s;
+    transform: translate(-50%, 0);
 }
-
-.modifOnOff.active::before {
-    background: #9c0;
+@keyframes message{
+    20%{transform: translate(-50%, 100%)}
+    80%{transform: translate(-50%, 100%)}
 }
-
-.modifOnOff.active::after {
-    transform: translateX(20px);
-}
\ No newline at end of file
diff --git a/app/static/js/table_editor.js b/app/static/js/table_editor.js
index 692268afb..c2ed4210a 100644
--- a/app/static/js/table_editor.js
+++ b/app/static/js/table_editor.js
@@ -1,34 +1,6 @@
-/* table_editor, par Sébastien L.
+/* table_editor, par Sébastien L. 2021-11-12
  */
 
-/******************************/
-/* Gestion de la modification */
-/******************************/
-
-function editableOnOff() {
-    if (this.classList.toggle("active")) {
-        document.querySelectorAll("[data-editable=true]").forEach(cellule => {
-            cellule.contentEditable = true;
-            cellule.addEventListener("input", delayBeforeSave);
-            cellule.addEventListener("blur", save);
-        })
-    } else {
-        document.querySelectorAll("[data-editable=true]").forEach(cellule => {
-            cellule.removeAttribute("contentEditable");
-            cellule.removeEventListener("input", delayBeforeSave);
-            cellule.removeEventListener("blur", save);
-        })
-    }
-}
-
-let timeout = 0;
-
-function delayBeforeSave() {
-    clearTimeout(timeout);
-    document.querySelector(".wait").classList.add("go");
-    timeout = setTimeout(() => { save(this) }, 2000);
-}
-
 /*****************************/
 /* Mise en place des données */
 /*****************************/
@@ -38,19 +10,117 @@ function build_table(data) {
     data.forEach((cellule) => {
         output += `
             <div 
-                class="${cellule.style}"
+                class="${cellule.style || ""}"
                 data-editable="${cellule.editable || "false"}"
                 data-module_id="${cellule.module_id}"
                 data-ue_id="${cellule.ue_id}"
+                data-x="${cellule.x}"
+                data-y="${cellule.y}"
+                data-nbX="${cellule.nbX || 1}"
+                data-nbY="${cellule.nbY || 1}"
+                data-data="${cellule.data}"
                 style="
                     --x:${cellule.x};
                     --y:${cellule.y};
-                    --nbX:${cellule.nbX};
-                    --nbY: ${cellule.nbY};
+                    --nbX:${cellule.nbX || 1};
+                    --nbY: ${cellule.nbY || 1};
                 ">
                 ${cellule.data}
             </div>`;
     })
     document.querySelector(".tableau").innerHTML = output;
-    document.querySelector(".modifOnOff").addEventListener("click", editableOnOff);
-}
\ No newline at end of file
+    installListeners();
+}
+
+/*****************************/
+/* Gestion des évènements    */
+/*****************************/
+$(function () {
+    document.body.addEventListener("keydown", key);
+});
+function installListeners() {
+    document.querySelectorAll("[data-editable=true]").forEach(cellule => {
+        cellule.addEventListener("click", function () { selectCell(this) });
+        cellule.addEventListener("dblclick", function () { modifCell(this) });
+    });
+}
+
+
+/*********************************/
+/* Interaction avec les cellules */
+/*********************************/
+function selectCell(obj) {
+    if (obj.classList.contains("modifying")) {
+        return; // Cellule en cours de modification, ne pas sélectionner.
+    }
+    let currentModif = document.querySelector(".modifying");
+    if (currentModif) {
+        if (!save(currentModif)) {
+            return;
+        }
+    }
+
+    document.querySelectorAll(".selected, .modifying").forEach(cellule => {
+        cellule.classList.remove("selected", "modifying");
+        cellule.removeAttribute("contentEditable");
+        cellule.removeEventListener("keydown", keyCell);
+    })
+    obj.classList.add("selected");
+}
+
+function modifCell(obj) {
+    if (obj) {
+        obj.classList.add("modifying");
+        obj.contentEditable = true;
+        obj.addEventListener("keydown", keyCell);
+        obj.focus();
+    }
+}
+
+function key(event) {
+    switch (event.key) {
+        case "Enter": modifCell(document.querySelector(".selected")); event.preventDefault(); break;
+        case "ArrowRight": ArrowMove(1, 0); break;
+        case "ArrowLeft": ArrowMove(-1, 0); break;
+        case "ArrowUp": ArrowMove(0, -1); break;
+        case "ArrowDown": ArrowMove(0, 1); break;
+    }
+}
+
+function ArrowMove(x, y) {
+    if (document.querySelector(".modifying") || !document.querySelector(".selected")) {
+        return;	// S'il n'y a aucune cellule selectionnée ou si une cellule est encours de modification, on ne change pas
+    }
+
+    let selected = document.querySelector(".selected");
+    let next = document.querySelector(`[data-x="${parseInt(selected.dataset.x) + x}"][data-y="${parseInt(selected.dataset.y) + y}"][data-editable="true"]`);
+
+    if (next) {
+        selectCell(next);
+    }
+}
+
+function keyCell(event) {
+    if (event.key == "Enter") {
+        event.preventDefault();
+        event.stopPropagation();
+        if (!save(this)) {
+            return
+        }
+        this.classList.remove("modifying");
+        ArrowMove(0, 1);
+    }
+}
+
+/******************************/
+/* Affichage d'un message     */
+/******************************/
+function message(msg) {
+    var div = document.createElement("div");
+    div.className = "message";
+    div.innerHTML = msg;
+    document.querySelector("body").appendChild(div);
+    setTimeout(() => {
+        div.remove();
+    }, 3000);
+}
diff --git a/app/templates/pn/form_modules_ue_coefs.html b/app/templates/pn/form_modules_ue_coefs.html
index 7c26f021a..e8f671bd8 100644
--- a/app/templates/pn/form_modules_ue_coefs.html
+++ b/app/templates/pn/form_modules_ue_coefs.html
@@ -13,10 +13,8 @@
 
 <body>
     <h2>Formation {{formation.titre}} ({{formation.acronyme}})
-     [version {{formation.version}}] code {{formation.code}}</h2>
-    
-    <div class=wait></div>
-    <div class=modifOnOff>Modifier</div>
+        [version {{formation.version}}] code {{formation.code}}</h2>
+
     <div class="tableau"></div>
 
     <script>
@@ -26,15 +24,24 @@
             });
         });
         function save(obj) {
-            if (event?.currentTarget) {
-                obj = event.currentTarget;
+            var value = obj.innerText.trim();
+            if (value.length == 0) {
+                value = "0";
             }
-            document.querySelector(".wait").classList.remove("go");
+            if (!/^\d+$/.test(value)) {
+                message("Il est attendu un nombre");
+                return false;
+            }
+            if (value == obj.dataset.data) {
+                return true;	// Aucune modification, pas d'enregistrement mais on continue normalement
+            }
+            obj.dataset.data = value;
+            obj.classList.add("wait");
             // XXX DEBUG
             console.log(`
                 x : ${getComputedStyle(obj).getPropertyValue("--x")}
                 y : ${getComputedStyle(obj).getPropertyValue("--y")}
-                data : ${obj.innerText}
+                data : ${value}
                 ue_id: ${obj.dataset.ue_id}
                 module_id : ${obj.dataset.module_id}
             `);
@@ -42,10 +49,17 @@
                 {
                     module_id: `${obj.dataset.module_id}`,
                     ue_id: `${obj.dataset.ue_id}`,
-                    coef: `${obj.innerText}`
+                    coef: `${value}`
                 },
                 function (result) {
-                    console.log("enregistré");
+                    console.log("enregistré"); // XXX
+                    obj.classList.remove("wait");
+                    obj.classList.add("good");
+                    // Lorsque les données sont bien enregistrés, on enlève 
+                    // l'indication que c'est bon au bout d'un temps
+                    setTimeout(() => {
+                        obj.classList.remove("good");
+                    }, 1000);
                 }
             );
         }