diff --git a/src/main/resources/static/css/commons/r11form.css b/src/main/resources/static/css/commons/r11form.css
index accde3f..46ae894 100644
--- a/src/main/resources/static/css/commons/r11form.css
+++ b/src/main/resources/static/css/commons/r11form.css
@@ -110,7 +110,7 @@
     color: #3bc4f1;
 }
 
-.deletion-button {
+.modification-button {
     padding: 0;
     outline: none;
     background: none;
@@ -118,21 +118,31 @@
     font-weight: 300;
 }
 
-.deletion-button.btn-tile:hover {
-    color: #ca1111;
-}
-
-.deletion-button.btn-hashmap {
+.modification-button.btn-add {
     font-size: 16px;
     color: #00000030;
     margin: auto 0 auto 0;
 }
 
-.deletion-button.btn-hashmap:hover {
+.modification-button.btn-add:hover {
+    color:#58ac43;
+}
+
+.modification-button.btn-tile:hover {
     color: #ca1111;
 }
 
-.deletion-button.btn-tile {
+.modification-button.btn-hashmap {
+    font-size: 16px;
+    color: #00000030;
+    margin: auto 0 auto 0;
+}
+
+.modification-button.btn-hashmap:hover {
+    color: #ca1111;
+}
+
+.modification-button.btn-tile {
     width: 10%;
     margin: 20% 0 0 0;
     font-size: 14px;
@@ -409,5 +419,5 @@
 }
 
 .hiddable.active {
-    display: block;
+    display: inherit;
 }
\ No newline at end of file
diff --git a/src/main/resources/static/html/mock.html b/src/main/resources/static/html/mock.html
index c9cfd97..f0f1b7e 100644
--- a/src/main/resources/static/html/mock.html
+++ b/src/main/resources/static/html/mock.html
@@ -91,13 +91,13 @@
                                         <tr>
                                             <td><input class="key" value="basic value"></td>
                                             <td><input value="basic value"></td>
-                                            <td><button class="deletion-button btn-hashmap"><i class="icon-cancel"></i></button></td>
+                                            <td><button class="modification-button btn-hashmap"><i class="icon-cancel"></i></button></td>
                                         </tr>
                                     </tbody>
                                     <tr>
                                         <td><input id="headerKeyInput" placeholder="name"></td>
                                         <td><input id="headerValueInput" placeholder="value"></td>
-                                        <td><button class="clickable-text"><i class="icon-plus"></i></button></td>
+                                        <td><button class="modification-button btn-add"><i class="icon-plus"></i></button></td>
                                     </tr>
                                 </table>
                             </div>
@@ -137,7 +137,7 @@
                                     <p>Status: 200</p>
                                 </div>
                                 <div>
-                                    <button class="deletion-button btn-tile"><i class="icon-cancel"></i></button>
+                                    <button class="modification-button btn-tile"><i class="icon-cancel"></i></button>
                                 </div>
                             </div>
                         </div>
@@ -150,7 +150,7 @@
                                     <p>Status: 200</p>
                                 </div>
                                 <div>
-                                    <button class="deletion-button btn-tile"><i class="icon-cancel"></i></button>
+                                    <button class="modification-button btn-tile"><i class="icon-cancel"></i></button>
                                 </div>
                             </div>
                         </div>
@@ -163,7 +163,7 @@
                                     <p>Status: 200</p>
                                 </div>
                                 <div>
-                                    <button class="deletion-button btn-tile"><i class="icon-cancel"></i></button>
+                                    <button class="modification-button btn-tile"><i class="icon-cancel"></i></button>
                                 </div>
                             </div>
                         </div>