diff --git a/docs/G300.txt b/docs/G300.txt
index ae73375..f882efc 100644
--- a/docs/G300.txt
+++ b/docs/G300.txt
@@ -1,7 +1,7 @@
 {
 	"global": {
 		"device_type": "G300",
-		"option_count": 63
+		"option_count": 64
 	},
 	"restore": {
 		"category": "base",
@@ -284,6 +284,16 @@
 		},
 		"depend_and": ["is-custom-area==true"]
 	},
+	"is-size-check": {
+		"category": "base",
+		"title": "尺寸检测",
+		"desc": "检测纸张实际尺寸与设置是否匹配",
+		"type": "bool",
+		"cur": false,
+		"default": false,
+		"size": 4,
+		"depend_and": ["paper!=匹配原始尺寸", "!=最大扫描尺寸", "!=最大扫描尺寸自动裁切"]
+	},
 	"page": {
 		"category": "base",
 		"title": "扫描页面",