diff --git a/docs/modules/react/api-reference/viewport.md b/docs/modules/react/api-reference/viewport.md
new file mode 100644
index 00000000..cce2aacc
--- /dev/null
+++ b/docs/modules/react/api-reference/viewport.md
@@ -0,0 +1,21 @@
+# Viewport
+
+### initialViewState (Object, optional)
+
+```js
+initialViewState={{
+  target: [0, 0],
+  zoom: 1,
+}}
+```
+ - target ([x: Number, y: Number], optional):  The target origin to the center of the view.
+ - zoom (Number, optional): The zoom level of the view.
+
+### `minZoom` (Number, optional)
+A minimum scale factor for zoom level of the graph.
+
+### `maxZoom` (Number, optional)
+A maximum scale factor for zoom level of the graph.
+
+### `viewportPadding` (Number, optional)
+Padding for fitting entire graph in the screen. (pixel)