diff --git a/assets/webui/index.html b/assets/webui/index.html
index e010b2c..76ce9ca 100644
--- a/assets/webui/index.html
+++ b/assets/webui/index.html
@@ -26,7 +26,7 @@
 			<div class="tool-group">
 				<button id="prevButton" class="icon-button arrow-prev" type="button" title="上一页" aria-label="上一页" aria-keyshortcuts="ArrowLeft" disabled></button>
 				<label class="page-control">
-					<input id="pageInput" type="number" min="1" value="0" disabled>
+					<input id="pageInput" type="number" min="1" value="0" title="当前页" aria-label="当前页" disabled>
 					<span>/</span>
 					<span id="pageTotal">0</span>
 				</label>
@@ -36,11 +36,11 @@
 				<button id="zoomOutButton" class="icon-button" type="button" title="缩小" aria-label="缩小" aria-keyshortcuts="-" disabled>-</button>
 				<span id="zoomLabel" class="zoom-label">100%</span>
 				<button id="zoomInButton" class="icon-button" type="button" title="放大" aria-label="放大" aria-keyshortcuts="= Shift+= Plus" disabled>+</button>
-				<button id="fitButton" class="button" type="button" data-short="宽" aria-label="适宽" disabled>适宽</button>
-				<button id="fitHeightButton" class="button" type="button" data-short="高" aria-label="适高" disabled>适高</button>
+				<button id="fitButton" class="button" type="button" data-short="宽" title="适应宽度" aria-label="适宽" disabled>适宽</button>
+				<button id="fitHeightButton" class="button" type="button" data-short="高" title="适应高度" aria-label="适高" disabled>适高</button>
 				<button id="rotateButton" class="button" type="button" data-short="转" title="右转90°" aria-label="旋转" disabled>旋转</button>
 				<button id="panButton" class="button" type="button" data-short="拖" title="拖动页面" aria-label="拖动" aria-pressed="false" disabled>拖动</button>
-				<button id="continuousButton" class="button" type="button" data-short="连" title="连续显示" aria-label="连续显示" aria-pressed="false" disabled>连续</button>
+				<button id="continuousButton" class="button" type="button" data-short="连" title="连续显示" aria-label="连续" aria-pressed="false" disabled>连续</button>
 				<button id="annotationButton" class="button" type="button" data-short="注" title="隐藏注解" aria-label="隐藏注解" aria-pressed="true">注解</button>
 			</div>
 			<div class="tool-group">
@@ -58,25 +58,25 @@
 		<div id="editorTools" class="editor-toolbar" role="toolbar" aria-label="编辑工具" hidden>
 			<div class="editor-group editor-file">
 				<button id="saveButton" class="button" type="button" title="另存为OFD" aria-label="另存为OFD" aria-keyshortcuts="Control+S Meta+S">保存</button>
-				<button id="undoButton" class="button" type="button" disabled>撤销</button>
-				<button id="redoButton" class="button" type="button" disabled>重做</button>
+				<button id="undoButton" class="button" type="button" title="撤销" aria-label="撤销" disabled>撤销</button>
+				<button id="redoButton" class="button" type="button" title="重做" aria-label="重做" disabled>重做</button>
 				<span>文件</span>
 			</div>
 			<div class="editor-group editor-objects">
-				<button id="compositeBackButton" class="button" type="button" title="返回上层" hidden>返回</button>
-				<button id="selectObjectButton" class="button" type="button" aria-pressed="true">选择</button>
-				<button id="multiSelectButton" class="button" type="button" aria-pressed="false" title="多选对象">多选</button>
-				<button id="editObjectButton" class="button" type="button" aria-label="修改对象" disabled>修改</button>
-				<button id="copyObjectButton" class="button" type="button" aria-label="复制对象" disabled>复制</button>
-				<button id="deleteObjectButton" class="button" type="button" disabled>删除</button>
-				<select id="objectOrder" class="order-select" aria-label="对象层级" disabled>
+				<button id="compositeBackButton" class="button" type="button" title="返回上层" aria-label="返回上层" hidden>返回</button>
+				<button id="selectObjectButton" class="button" type="button" title="选取对象" aria-label="选取对象" aria-pressed="true">选择</button>
+				<button id="multiSelectButton" class="button" type="button" aria-pressed="false" title="多选对象" aria-label="多选对象">多选</button>
+				<button id="editObjectButton" class="button" type="button" title="修改对象" aria-label="修改对象" disabled>修改</button>
+				<button id="copyObjectButton" class="button" type="button" title="复制对象" aria-label="复制对象" disabled>复制</button>
+				<button id="deleteObjectButton" class="button" type="button" title="删除对象" aria-label="删除对象" disabled>删除</button>
+				<select id="objectOrder" class="order-select" aria-label="对象层级" title="对象层级" disabled>
 					<option value="" hidden>层级</option>
 					<option value="up">上移</option>
 					<option value="down">下移</option>
 					<option value="top">置顶</option>
 					<option value="bottom">置底</option>
 				</select>
-				<select id="objectAlign" class="order-select" aria-label="对象对齐" disabled>
+				<select id="objectAlign" class="order-select" aria-label="对象对齐" title="对象对齐" disabled>
 					<option value="" hidden>对齐</option>
 					<option value="left">左侧</option>
 					<option value="center">水平</option>
@@ -85,7 +85,7 @@
 					<option value="middle">垂直</option>
 					<option value="bottom">底部</option>
 				</select>
-				<select id="objectDistribute" class="order-select" aria-label="对象分布" disabled>
+				<select id="objectDistribute" class="order-select" aria-label="对象分布" title="对象分布" disabled>
 					<option value="" hidden>分布</option>
 					<option value="horizontal">水平</option>
 					<option value="vertical">垂直</option>
@@ -106,7 +106,7 @@
 			<div class="editor-group">
 				<div class="text-font"><div class="font-picker"><input id="textFont" type="text" role="combobox" aria-label="字体" title="字体" aria-autocomplete="list" aria-controls="textFontList" aria-expanded="false" autocomplete="off" spellcheck="false" disabled><button id="textFontToggle" type="button" title="选择字体" aria-label="选择字体" tabindex="-1" disabled></button></div><button id="textFontAdd" class="icon-button" type="button" title="添加字体" aria-label="添加字体">+</button></div>
 				<div id="textFontList" class="font-listbox" role="listbox" aria-label="字体列表" popover="manual"></div>
-				<label class="editor-field"><span>字号</span><span class="editor-number"><input id="textSize" type="number" min="1" step="any" required aria-label="字号" disabled><span>pt</span></span></label>
+				<label class="editor-field"><span>字号</span><span class="editor-number"><input id="textSize" type="number" min="1" step="any" required title="字号" aria-label="字号" disabled><span>pt</span></span></label>
 				<input id="textColor" class="color-input" type="color" value="#000000" aria-label="文字颜色" title="文字颜色" disabled>
 				<span>文字</span>
 			</div>
@@ -119,7 +119,7 @@
 					<option value="justify">两端</option>
 				</select>
 				<label class="editor-field"><span>行距</span><span class="editor-number"><input id="textLineHeight" type="number" min="0" step="any" placeholder="自动" aria-label="行距" title="行距，0为自动" disabled><span>pt</span></span></label>
-				<button id="textWrap" class="button" type="button" aria-label="自动折行" aria-pressed="false" disabled>折行</button>
+				<button id="textWrap" class="button" type="button" title="自动折行" aria-label="自动折行" aria-pressed="false" disabled>折行</button>
 				<label class="editor-field"><span>字距</span><span class="editor-number"><input id="textSpacing" type="number" step="any" placeholder="0" aria-label="字距" title="字距" disabled><span>pt</span></span></label>
 				<button id="paragraphButton" class="editor-group-action" type="button" title="段落缩进" aria-label="段落缩进" aria-haspopup="dialog" aria-controls="paragraphPanel" disabled>段落</button>
 			</div>
@@ -130,22 +130,22 @@
 				<span>图形</span>
 			</div>
 			<div class="editor-group editor-image">
-				<select id="imageFit" aria-label="图片适应方式" disabled>
+				<select id="imageFit" aria-label="缩放图片" title="缩放图片" disabled>
 					<option value="" hidden>缩放</option>
 					<option value="contain">适应</option>
 					<option value="cover">填充</option>
 				</select>
-				<button id="cropImageButton" class="button" type="button" aria-label="裁剪图片" aria-pressed="false" disabled>裁剪</button>
-				<button id="resetCropButton" class="button" type="button" aria-label="还原图片" disabled>还原</button>
+				<button id="cropImageButton" class="button" type="button" title="裁剪图片" aria-label="裁剪图片" aria-pressed="false" disabled>裁剪</button>
+				<button id="resetCropButton" class="button" type="button" title="还原图片" aria-label="还原图片" disabled>还原</button>
 				<span>图片</span>
 			</div>
 			<div class="editor-group editor-transform">
-				<select id="objectRotate" class="order-select" aria-label="对象旋转" disabled>
+				<select id="objectRotate" class="order-select" aria-label="对象旋转" title="对象旋转" disabled>
 					<option value="" hidden>旋转</option>
 					<option value="90">右转90°</option>
 					<option value="-90">左转90°</option>
 				</select>
-				<select id="objectFlip" class="order-select" aria-label="对象翻转" disabled>
+				<select id="objectFlip" class="order-select" aria-label="对象翻转" title="对象翻转" disabled>
 					<option value="" hidden>翻转</option>
 					<option value="horizontal">水平</option>
 					<option value="vertical">垂直</option>
@@ -159,11 +159,11 @@
 			</div>
 			<div class="editor-group">
 				<select id="addPageButton" aria-label="新增页面" title="新增页面"><option value="" hidden>新增</option><option value="blank">空白</option><option value="import">插页</option></select>
-				<button id="copyPageButton" class="button" type="button" aria-label="复制页面">复制</button>
-				<button id="deletePageButton" class="button" type="button" aria-label="删除页面">删除</button>
-				<button id="movePagePrevButton" class="button" type="button" aria-label="页面前移">前移</button>
-				<button id="movePageNextButton" class="button" type="button" aria-label="页面后移">后移</button>
-				<button id="pageSettingsButton" class="button" type="button" aria-label="页面设置" aria-haspopup="dialog" aria-controls="pagePanel">设置</button>
+				<button id="copyPageButton" class="button" type="button" title="复制页面" aria-label="复制页面">复制</button>
+				<button id="deletePageButton" class="button" type="button" title="删除页面" aria-label="删除页面">删除</button>
+				<button id="movePagePrevButton" class="button" type="button" title="页面前移" aria-label="页面前移">前移</button>
+				<button id="movePageNextButton" class="button" type="button" title="页面后移" aria-label="页面后移">后移</button>
+				<button id="pageSettingsButton" class="button" type="button" title="页面设置" aria-label="页面设置" aria-haspopup="dialog" aria-controls="pagePanel">设置</button>
 				<button id="batchPagesButton" class="editor-group-action" type="button" title="批量页面" aria-label="批量页面" aria-haspopup="dialog" aria-controls="batchPagesPanel">页面</button>
 			</div>
 		</div>