diff --git a/en/option/series/graph.md b/en/option/series/graph.md
index 01cd4083d..71f7ac6c4 100644
--- a/en/option/series/graph.md
+++ b/en/option/series/graph.md
@@ -146,7 +146,7 @@ Related zooming ratio of nodes when mouse zooming in or out. When it is set as 0
 
 <ExampleUIControlBoolean default="false" />
 
-If node is draggable.
+If node is draggable. Only available when using force-directed layout.
 
 {{ use: partial-symbol(
     prefix = '#',
diff --git a/zh/option/series/graph.md b/zh/option/series/graph.md
index 7d6edef72..9848dba0c 100644
--- a/zh/option/series/graph.md
+++ b/zh/option/series/graph.md
@@ -160,7 +160,7 @@ edgeLength: [10, 50]
 
 <ExampleUIControlBoolean default="false" />
 
-节点是否可拖拽。
+节点是否可拖拽，只在使用力引导布局的时候有用。
 
 {{ use: partial-symbol(
     prefix = '#',