Update help page

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

src/pages/help.vue

@@ -30,8 +30,11 @@
             <li>Click on each tag to see the structure highlighted in the image or click on the image to see the tag for that structure (additional clicks to the same area will select overlapping structres).</li>
             <li>Tag color and proportion filled indicate ALVINN's level of confidence in the identification.</li>
             <li>An incorrect tag can be deleted by clicking on the tag's <f7-icon icon="chip-delete" style="margin-right: 1px;"></f7-icon> button.</li>
+            <li>Click on the zoom to structure button <SvgIcon icon="zoom_to" class="list-svg"/> to magnify the view of the selected structure</li>
           </ul>
         </li>
+        <li>Pan (middle click or touch and drag) and zoom (mouse wheel or pinch) to manually select detailed views in the image.</li>
+        <li>The reset zoom button <SvgIcon icon="reset_zoom" class="list-svg"/> will return the image to its initial position and magnification.</li>
       </ol>
     <h2>Advanced Features</h2>
     <h3>Detection Parameters</h3>