diff --git a/index.html b/index.html
index 5c667f2c..d7d64c54 100644
--- a/index.html
+++ b/index.html
@@ -47,6 +47,7 @@
 <div id='gameGroup'>
     <p id='mainTips'>请稍候...</p>
     <img id='musicBtn'>
+    <img id='enlargeBtn'>
     <div id='startPanel'>
         <div id='startTop'>
             <div id='startTopProgressBar'>
diff --git a/libs/control.js b/libs/control.js
index 74a092b8..8cbae3a0 100644
--- a/libs/control.js
+++ b/libs/control.js
@@ -367,6 +367,7 @@ control.prototype._showStartAnimate_resetDom = function () {
     core.clearStatus();
     core.clearMap('all');
     core.dom.musicBtn.style.display = 'block';
+    core.dom.enlargeBtn.style.display = 'block';
     core.setMusicBtn();
     // 重置音量
     core.events.setVolume(1, 0);
@@ -2783,6 +2784,7 @@ control.prototype.setMusicBtn = function () {
         core.dom.musicBtn.src = "data:image/png;base64,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";
     else
         core.dom.musicBtn.src = "data:image/png;base64,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";
+    core.dom.enlargeBtn.src = "data:image/svg+xml;base64,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";
 }
 
 ////// 更改背景音乐的播放 //////
@@ -2856,6 +2858,21 @@ control.prototype.checkBgm = function() {
     core.playBgm(core.musicStatus.playingBgm || main.startBgm);
 }
 
+///// 设置屏幕大小 //////
+control.prototype.setDisplaySize = function (delta) {
+    var index = core.domStyle.availableScale.indexOf(core.domStyle.scale);
+    if (index < 0) return;
+    index += delta;
+    if (index < 0 || index >= core.domStyle.availableScale.length);
+    core.domStyle.scale = core.domStyle.availableScale[index];
+    core.setLocalStorage('scale', core.domStyle.scale);
+    core.resize();
+    var currentRatio = Math.max(window.devicePixelRatio || 1, core.domStyle.scale);
+    if (currentRatio > core.domStyle.ratio && core.isPlaying()) {
+        core.drawTip("需刷新页面以调整UI清晰度");
+    }
+}
+
 // ------ 状态栏，工具栏等相关 ------ //
 
 ////// 清空状态栏 //////
@@ -3168,10 +3185,14 @@ control.prototype._resize_gameGroup = function (obj) {
     // musicBtn
     if (core.domStyle.isVertical || core.domStyle.scale < 1) {
         core.dom.musicBtn.style.right = core.dom.musicBtn.style.bottom = "3px";
+        core.dom.enlargeBtn.style.right = "34px";
+        core.dom.enlargeBtn.style.bottom = "3px"
     }
     else {
         core.dom.musicBtn.style.right = (obj.clientWidth - totalWidth) / 2 + "px";
         core.dom.musicBtn.style.bottom = (obj.clientHeight - totalHeight) / 2 - 27 + "px";
+        core.dom.enlargeBtn.style.right = (obj.clientWidth - totalWidth) / 2 + 31 + "px";
+        core.dom.enlargeBtn.style.bottom = (obj.clientHeight - totalHeight) / 2 - 27 + "px";
     }
 }
 
diff --git a/libs/core.js b/libs/core.js
index 5044f2d1..3c108ad0 100644
--- a/libs/core.js
+++ b/libs/core.js
@@ -272,6 +272,7 @@ core.prototype.init = function (coreData, callback) {
         });
     });    
     core.dom.musicBtn.style.display = 'block';
+    core.dom.enlargeBtn.style.display = 'block';
     core.setMusicBtn();
 }
 
diff --git a/libs/events.js b/libs/events.js
index e765107a..21227da4 100644
--- a/libs/events.js
+++ b/libs/events.js
@@ -58,6 +58,7 @@ events.prototype._startGame_start = function (hard, seed, route, callback) {
     if (core.flags.startUsingCanvas) {
         core.hideStatusBar();
         core.dom.musicBtn.style.display = 'block';
+        core.dom.enlargeBtn.style.display = 'block';
         core.push(todo, core.firstData.startCanvas);
     }
     core.push(todo, {"type": "function", "function": "function() { core.events._startGame_setHard(); }"})
diff --git a/main.js b/main.js
index 2e0abee0..a822a071 100644
--- a/main.js
+++ b/main.js
@@ -23,6 +23,7 @@ function main() {
         'gameGroup': document.getElementById('gameGroup'),
         'mainTips': document.getElementById('mainTips'),
         'musicBtn': document.getElementById('musicBtn'),
+        'enlargeBtn': document.getElementById('enlargeBtn'),
         'startPanel': document.getElementById('startPanel'),
         'startTop': document.getElementById('startTop'),
         'startTopProgressBar': document.getElementById('startTopProgressBar'),
@@ -761,6 +762,10 @@ main.dom.musicBtn.onclick = function () {
     } catch (e) {main.log(e);}
 }
 
+main.dom.enlargeBtn.onclick = function () {
+    
+}
+
 window.onblur = function () {
     if (main.core && main.core.control) {
         try {
diff --git a/project/functions.js b/project/functions.js
index 3dd054f5..4388c052 100644
--- a/project/functions.js
+++ b/project/functions.js
@@ -50,6 +50,7 @@ var functions_d6ad677b_427a_4623_b50f_a445a3b0ef8a =
 		core.showStatusBar();
 	// 隐藏右下角的音乐按钮
 	core.dom.musicBtn.style.display = 'none';
+	core.dom.enlargeBtn.style.display = 'none';
 },
         "win": function (reason, norank, noexit) {
 	// 游戏获胜事件
diff --git a/styles.css b/styles.css
index e97facb4..de44a4a3 100644
--- a/styles.css
+++ b/styles.css
@@ -33,6 +33,15 @@
     display: none;
 }
 
+#enlargeBtn {
+    position: fixed;
+    bottom: 3px;
+    right: 34px;
+    cursor: pointer;
+    z-index: 400;
+    display: none;
+}
+
 #startPanel {
     width: 100%;
     height: 100%;