diff --git a/css/main.css b/css/main.css
index 78c9e5d..de6a446 100644
--- a/css/main.css
+++ b/css/main.css
@@ -238,6 +238,7 @@ td {
     box-shadow: none;
     text-shadow: none;
     flex-shrink: 0;
+    font-size: 12px;
 }
 
 .nav-left {
diff --git a/index.html b/index.html
index d7d5a12..e73bed4 100644
--- a/index.html
+++ b/index.html
@@ -26,19 +26,19 @@
     <div id="content">
       <div class="content-panel">
         <div class="nav-bar">
-          <button id="btn-review" class="navigation nav-right"><b>☰</b></button>
+          <button id="btn-review" class="navigation nav-right"><b>☰</b><br/>OVERVIEW</button>
           <button
             id="btn-submit-nav"
             class="submit-button navigation nav-right"
           >
-            <b>submit</b>
+            <b>SUBMIT</b>
           </button>
           <button
             id="btn-review-overlay"
             class="navigation nav-right"
             title="click to finish exam and review answers"
           >
-            review
+            REVIEW
           </button>
           <button
             id="btn-fullscreen-overlay"
@@ -50,13 +50,44 @@
           <div class="app-name nav-left">RTS</div>
           <div id="timer" title="click to pause"></div>
           <div class="exam-name" title="currently loaded packet"></div>
-          <input
-            type="button"
-            class="navigation nav-left"
-            value="previous"
-            disabled="disabled"
-          />
-          <input type="button" class="navigation nav-left" value="next" />
+          <button class="navigation nav-left" disabled="disabled"
+            data-nav="previous"
+          >
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              width="16"
+              height="16"
+              fill="currentColor"
+              class="bi bi-arrow-left-short"
+              viewBox="0 0 16 16"
+            >
+              <path
+                fill-rule="evenodd"
+                d="M12 8a.5.5 0 0 1-.5.5H5.707l2.147 2.146a.5.5 0 0 1-.708.708l-3-3a.5.5 0 0 1 0-.708l3-3a.5.5 0 1 1 .708.708L5.707 7.5H11.5a.5.5 0 0 1 .5.5"
+              />
+            </svg>
+            <br />
+            <span>PREVIOUS</span>
+          </button>
+          <button class="navigation nav-left"
+            data-nav="next"
+          >
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              width="16"
+              height="16"
+              fill="currentColor"
+              class="bi bi-arrow-right-short"
+              viewBox="0 0 16 16"
+            >
+              <path
+                fill-rule="evenodd"
+                d="M4 8a.5.5 0 0 1 .5-.5h5.793L8.146 5.354a.5.5 0 1 1 .708-.708l3 3a.5.5 0 0 1 0 .708l-3 3a.5.5 0 0 1-.708-.708L10.293 8.5H4.5A.5.5 0 0 1 4 8"
+              />
+            </svg>
+            <br />
+            <span>NEXT</span>
+          </button>
         </div>
         <div class="main-panel">
           <div class="question-list-panel" style="display: block"></div>
diff --git a/js/main.js b/js/main.js
index f9cc97a..c846702 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1140,12 +1140,12 @@ async function loadQuestion(n, section = 1, force_reload = false) {
   loaded_question = n;
 
   // Set up question navigation
-  $(".navigation[value='next']").off();
-  $(".navigation[value='previous']").off();
+  $(".navigation[data-nav='next']").off();
+  $(".navigation[data-nav='previous']").off();
   if (n == 0) {
-    $(".navigation[value='previous']").attr("disabled", "disabled");
+    $(".navigation[data-nav='previous']").attr("disabled", "disabled");
   } else {
-    $(".navigation[value='previous']")
+    $(".navigation[data-nav='previous']")
       .removeAttr("disabled")
       .click(function() {
         loadQuestion(n - 1);
@@ -1153,9 +1153,9 @@ async function loadQuestion(n, section = 1, force_reload = false) {
   }
 
   if (n == exam_details.number_of_questions - 1) {
-    $(".navigation[value='next']").attr("disabled", "disabled");
+    $(".navigation[data-nav='next']").attr("disabled", "disabled");
   } else {
-    $(".navigation[value='next']")
+    $(".navigation[data-nav='next']")
       .removeAttr("disabled")
       .click(function() {
         loadQuestion(n + 1);
diff --git a/js/viewer.js b/js/viewer.js
index 1f3ac5a..c093097 100644
--- a/js/viewer.js
+++ b/js/viewer.js
@@ -74,13 +74,7 @@ export function loadMainImage(image, stack) {
       // already fullscreen (disable it)
       disableFullscreen(this);
     } else {
-      $(".content-panel").prepend($(".canvas-panel"));
-      $(".canvas-panel").toggleClass("canvas-panel canvas-panel-fullscreen");
-      $("#dicom-image").attr("height", "100%");
-      $("#dicom-image").height("100%");
-      // $(".cornerstone-canvas").attr("height", "100%");
-      // $(".cornerstone-canvas").height("100%");
-      cornerstone.resize(this, true);
+      enableFullscreen(this);
     }
   });
 
@@ -163,6 +157,9 @@ export function disableFullscreen(dicom_element) {
   $(".canvas-panel-fullscreen").toggleClass(
     "canvas-panel canvas-panel-fullscreen"
   );
+
+  $("#disable-fullscreen-viewer-button").hide();
+  $("#fullscreen-viewer-button").show();
   $(".question").prepend($(".canvas-panel"));
   $(".canvas-panel").get(0).scrollIntoView();
 
@@ -384,7 +381,7 @@ export function changeControlSelection() {
       break;
     }
     case "reset": {
-      cornerstone.reset(dicom_element);
+      resetViewer(dicom_element);
       sel.selectedIndex = old;
       sel.oldSelectedIndex = old;
       break;
@@ -400,6 +397,12 @@ export function changeControlSelection() {
   }
 }
 
+function resetViewer(dicom_element) {
+  cornerstoneTools.clearToolState(dicom_element, "RectangleRoi");
+  cornerstoneTools.clearToolState(dicom_element, "Length");
+  cornerstone.reset(dicom_element);
+}
+
 /**
  * Handle key button events
  * These are the same as in the RCR pratique implementation
@@ -425,6 +428,10 @@ export function keydown_handler(event) {
       sel.selectedIndex = find_option(sel, "pan");
       changeControlSelection();
       break;
+    case "KeyC":
+      sel.selectedIndex = find_option(sel, "rectangle");
+      changeControlSelection();
+      break;
     case "KeyZ":
       sel.selectedIndex = find_option(sel, "zoom");
       changeControlSelection();
@@ -463,7 +470,7 @@ export function keydown_handler(event) {
       changeControlSelection();
       break;
     // Escape and C do the same
-    case "KeyC":
+    //case "KeyC":
     case "Escape":
       sel.selectedIndex = find_option(sel, "close");
       changeControlSelection();
@@ -524,7 +531,7 @@ export function keydown_handler(event) {
           manualZoomDicom(-1);
           break;
         case "rotate":
-          manualRotateDicom(1);
+          manualRotateDicom(-1);
           break;
         case "scroll":
           manualScrollDicom(1);
@@ -544,7 +551,7 @@ export function keydown_handler(event) {
           manualZoomDicom(1);
           break;
         case "rotate":
-          manualRotateDicom(-1);
+          manualRotateDicom(1);
           break;
         case "scroll":
           manualScrollDicom(-1);
@@ -688,13 +695,16 @@ export function openMainImage(current_question, t, source) {
         <option value="reset">reset [e]</option>
         <option value="notes" disabled="true">[modality = SC]</option>
       </select>
-      <button class="title-bar-button" title="RESET VIEW" class="reset"><span class="viewer-icon"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
+  <button id="reset-viewer-button" class="title-bar-button" title="RESET VIEW" class="reset"><span class="viewer-icon"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
   <path fill-rule="evenodd" d="M8 3a5 5 0 1 1-4.546 2.914.5.5 0 0 0-.908-.417A6 6 0 1 0 8 2z"/>
   <path d="M8 4.466V.534a.25.25 0 0 0-.41-.192L5.23 2.308a.25.25 0 0 0 0 .384l2.36 1.966A.25.25 0 0 0 8 4.466"/>
 </svg></span></button>
-<button class="title-bar-button" title="TOGGLE FULLSCREEN" class="expand"><span class="viewer-icon"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-fullscreen" viewBox="0 0 16 16">
+<button id="fullscreen-viewer-button" class="title-bar-button" title="TOGGLE FULLSCREEN" class="expand"><span class="viewer-icon"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-fullscreen" viewBox="0 0 16 16">
   <path d="M1.5 1a.5.5 0 0 0-.5.5v4a.5.5 0 0 1-1 0v-4A1.5 1.5 0 0 1 1.5 0h4a.5.5 0 0 1 0 1zM10 .5a.5.5 0 0 1 .5-.5h4A1.5 1.5 0 0 1 16 1.5v4a.5.5 0 0 1-1 0v-4a.5.5 0 0 0-.5-.5h-4a.5.5 0 0 1-.5-.5M.5 10a.5.5 0 0 1 .5.5v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 1 0 1h-4A1.5 1.5 0 0 1 0 14.5v-4a.5.5 0 0 1 .5-.5m15 0a.5.5 0 0 1 .5.5v4a1.5 1.5 0 0 1-1.5 1.5h-4a.5.5 0 0 1 0-1h4a.5.5 0 0 0 .5-.5v-4a.5.5 0 0 1 .5-.5"/>
 </svg></span></button>
+<button style="display:none;" id="disable-fullscreen-viewer-button" class="title-bar-button" title="TOGGLE FULLSCREEN" class="expand"><span class="viewer-icon"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-fullscreen-exit" viewBox="0 0 16 16">
+  <path d="M5.5 0a.5.5 0 0 1 .5.5v4A1.5 1.5 0 0 1 4.5 6h-4a.5.5 0 0 1 0-1h4a.5.5 0 0 0 .5-.5v-4a.5.5 0 0 1 .5-.5m5 0a.5.5 0 0 1 .5.5v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 1 0 1h-4A1.5 1.5 0 0 1 10 4.5v-4a.5.5 0 0 1 .5-.5M0 10.5a.5.5 0 0 1 .5-.5h4A1.5 1.5 0 0 1 6 11.5v4a.5.5 0 0 1-1 0v-4a.5.5 0 0 0-.5-.5h-4a.5.5 0 0 1-.5-.5m10 1a1.5 1.5 0 0 1 1.5-1.5h4a.5.5 0 0 1 0 1h-4a.5.5 0 0 0-.5.5v4a.5.5 0 0 1-1 0z"/>
+</svg></span></button>
 <button id="close-viewer-button" class="title-bar-button" title="CLOSE VIEWER"><span class="viewer-icon"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-x-lg" viewBox="0 0 16 16">
   <path d="M2.146 2.854a.5.5 0 1 1 .708-.708L8 7.293l5.146-5.147a.5.5 0 0 1 .708.708L8.707 8l5.147 5.146a.5.5 0 0 1-.708.708L8 8.707l-5.146 5.147a.5.5 0 0 1-.708-.708L7.293 8z"/>
 </svg></span></button></div>
@@ -720,11 +730,20 @@ export function openMainImage(current_question, t, source) {
       }
     }
 
+    const dicom_element = document.getElementById("dicom-image");
     // Bind button actions
     $("#close-viewer-button").click(function () {
-      const dicom_element = document.getElementById("dicom-image");
       closeViewer(dicom_element);
     });
+    $("#reset-viewer-button").click(function () {
+      resetViewer(dicom_element);
+    });
+    $("#fullscreen-viewer-button").click(function () {
+      enableFullscreen(dicom_element);
+    });
+    $("#disable-fullscreen-viewer-button").click(function () {
+      disableFullscreen(dicom_element);
+    });
 
     load(images, annotations);
   }
@@ -754,3 +773,16 @@ export function urltoFile(url, filename, mimeType) {
       return new File([buf], filename, { type: mimeType });
     });
 }
+
+
+function enableFullscreen(dicom_element) {
+    $(".content-panel").prepend($(".canvas-panel"));
+    $(".canvas-panel").toggleClass("canvas-panel canvas-panel-fullscreen");
+    $("#dicom-image").attr("height", "100%");
+    $("#dicom-image").height("100%");
+    $("#disable-fullscreen-viewer-button").show();
+    $("#fullscreen-viewer-button").hide();
+    // $(".cornerstone-canvas").attr("height", "100%");
+    // $(".cornerstone-canvas").height("100%");
+    cornerstone.resize(dicom_element, true);
+}
\ No newline at end of file