diff --git a/assets/webui/index.html b/assets/webui/index.html
index 962c88f..2ea1382 100644
--- a/assets/webui/index.html
+++ b/assets/webui/index.html
@@ -38,7 +38,7 @@
 				<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="rotateButton" class="button" type="button" data-short="转" title="顺时针旋转90°" aria-label="旋转" disabled>旋转</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="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>