diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0afca3e..a9b5267 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.6.0] - 2026-03-04
+
+### Fixed
+- **保留手动调整的参考区**：图像重新加载、关闭编辑器窗口后，优先恢复 `region_coords` 中保存的手动选区，不再重置回 padding 计算值
+- **padding 变化时同步 widget**：调整 padding 后同步更新 `region_coords`，保证前端显示与后端输出一致
+
+### Changed
+- **允许无蒙版运行**：没有 Alpha 通道或蒙版为空时不再报错，输出空蒙版并把参考区设为整张图像，使节点可作为纯图像输入使用
+
 ## [1.5.0] - 2026-03-04
 
 ### Added
diff --git a/nodes.py b/nodes.py
index 627c208..6f273dd 100644
--- a/nodes.py
+++ b/nodes.py
@@ -75,13 +75,8 @@ class InpaintRegionEditor:
             mask = np.array(img.getchannel("A")).astype(np.float32) / 255.0
             mask = 1.0 - mask  # ComfyUI 约定：1=遮罩区域
         else:
-            raise ValueError(
-                "Please create a mask first (inpainting requires a mask)\n"
-                "You can create one by:\n"
-                "1. Upload a PNG with Alpha channel\n"
-                "2. Edit in Photopea and save\n"
-                "3. Use ComfyUI's built-in mask editor"
-            )
+            # 没有 Alpha 通道时允许作为纯图像输入，输出空蒙版
+            mask = np.zeros((img_height, img_width), dtype=np.float32)
 
         # 计算蒙版边界框
         mask_bounds = self._calculate_mask_bounds(mask)
@@ -94,11 +89,20 @@ class InpaintRegionEditor:
             except:
                 pass
 
-        if not region_rect:
+        # 没有有效蒙版时直接返回全图作为参考区，不再强制要求绘制蒙版
+        has_mask = mask_bounds["width"] > 0 and mask_bounds["height"] > 0
+        if not has_mask:
+            region_rect = {
+                "x": 0,
+                "y": 0,
+                "width": img_width,
+                "height": img_height,
+            }
+        elif not region_rect:
             region_rect = self._calculate_region_rect(mask_bounds, padding)
 
-        # 验证
-        if (
+        # 只有在有蒙版时才验证选区必须包含蒙版
+        if has_mask and (
             region_rect["width"] < mask_bounds["width"]
             or region_rect["height"] < mask_bounds["height"]
         ):
diff --git a/pyproject.toml b/pyproject.toml
index dff5d82..fbc76a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "comfyui-inpaint-region-editor"
 description = "A ComfyUI custom node for inpainting workflows with integrated Photopea editing and adjustable region selection."
-version = "1.5.1"
+version = "1.6.0"
 license = { file = "LICENSE" }
 dependencies = []
 
diff --git a/web/extension.js b/web/extension.js
index 2e421ff..a14dfbe 100644
--- a/web/extension.js
+++ b/web/extension.js
@@ -665,6 +665,14 @@ function closePhotopeaMaskModal() {
 
 const nodeImageData = new Map();  // 存储每个节点的图像和选区数据
 
+// 检查选区是否包含蒙版边界框
+function regionContainsMask(region, mask) {
+    return region.x <= mask.x &&
+           region.y <= mask.y &&
+           region.x + region.width >= mask.x + mask.width &&
+           region.y + region.height >= mask.y + mask.height;
+}
+
 // 约束选区：框住蒙版且不超出图像边界
 function constrainRegion(data, padding) {
     if (!data.hasMask || !data.maskBounds) return;
@@ -773,11 +781,31 @@ async function loadImageAndDetectMask(node, imageName) {
             
             if (hasMask && minX <= maxX && minY <= maxY) {
                 data.maskBounds = { x: minX, y: minY, width: maxX - minX + 1, height: maxY - minY + 1 };
-                // 使用统一的约束函数计算选区
-                constrainRegion(data, padding);
-                
-                // 同步到 region_coords widget
+
+                // 优先恢复用户手动调整过的选区（如果仍然包含当前蒙版）
+                // 避免图像重新加载、关闭编辑器窗口等操作把手动调整重置回 padding 计算值
                 const coordsWidget = node.widgets?.find(w => w.name === "region_coords");
+                let restored = false;
+                if (coordsWidget && coordsWidget.value && coordsWidget.value !== "{}") {
+                    try {
+                        const saved = JSON.parse(coordsWidget.value);
+                        if (saved && saved.width > 0 && saved.height > 0 &&
+                            regionContainsMask(saved, data.maskBounds)) {
+                            data.regionX = saved.x;
+                            data.regionY = saved.y;
+                            data.regionWidth = saved.width;
+                            data.regionHeight = saved.height;
+                            restored = true;
+                        }
+                    } catch (e) {}
+                }
+
+                if (!restored) {
+                    // 使用统一的约束函数计算选区
+                    constrainRegion(data, padding);
+                }
+
+                // 同步到 region_coords widget
                 if (coordsWidget) {
                     coordsWidget.value = JSON.stringify({
                         x: Math.round(data.regionX),
@@ -1339,6 +1367,16 @@ app.registerExtension({
                     if (data && data.hasMask && data.maskBounds) {
                         // 使用统一的约束函数重新计算选区
                         constrainRegion(data, v);
+                        // 同步到 region_coords widget，保证显示与后端使用一致
+                        const coordsWidget = node.widgets?.find(w => w.name === "region_coords");
+                        if (coordsWidget) {
+                            coordsWidget.value = JSON.stringify({
+                                x: Math.round(data.regionX),
+                                y: Math.round(data.regionY),
+                                width: Math.round(data.regionWidth),
+                                height: Math.round(data.regionHeight)
+                            });
+                        }
                     }
                     node.setDirtyCanvas(true);
                 };