You can create bookmarks in the Node Editor to store the current node graph as a quick reference.
Creating a bookmark (Method 1)
The Name Bookmark window appears. You can provide a custom name for your bookmark; otherwise, it is assigned a default name.
Creating a bookmark (Method 2)
on the toolbar.
The Name Bookmark window appears. You can provide a custom name for your bookmark; otherwise, it is assigned a default name.
Loading an existing bookmark (Method 1)
Loading an existing bookmark (Method 2)
and 
buttons in the toolbar to step through the bookmarks. Click to load the previous and to load the next bookmark.
You can edit bookmarks by using the Bookmark Editor. Select Bookmarks > Bookmark Editor or click 
on the toolbar to open the Bookmark Editor.
Renaming a bookmark (Method 1)
Renaming a bookmark (Method 2)
beside the bookmark name.
You can replace an existing bookmark with your current graph layout as follows:
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