feat:page scale shortcut key title

index.html

@@ -191,8 +191,8 @@
       </div>
       <div class="menu-divider"></div>
       <div class="menu-item">
-        <div class="menu-item__search" data-menu="search">
+        <div class="menu-item__search" data-menu="search" title="搜索与替换(Ctrl+F)">
-          <i title="搜索与替换"></i>
+          <i></i>
         </div>
         <div class="menu-item__search__collapse" data-menu="search">
           <div class="menu-item__search__collapse__search">
@@ -211,7 +211,7 @@
             <button>替换</button>
           </div>
         </div>
-        <div class="menu-item__print" data-menu="print" title="打印">
+        <div class="menu-item__print" data-menu="print" title="打印(Ctrl+P)">
           <i></i>
         </div>
       </div>
@@ -234,11 +234,11 @@
       </div>
       <div class="editor-mode" title="编辑模式(编辑、清洁、只读)">编辑模式</div>
       <div>
-        <div class="page-scale-minus" title="缩小">
+        <div class="page-scale-minus" title="缩小(Ctrl+-)">
           <i></i>
         </div>
-        <span class="page-scale-percentage" title="显示比例(点击可复原)">100%</span>
+        <span class="page-scale-percentage" title="显示比例(点击可复原Ctrl+0)">100%</span>
-        <div class="page-scale-add" title="放大">
+        <div class="page-scale-add" title="放大(Ctrl+=)">
           <i></i>
         </div>
         <div class="paper-size">