Click or use the shortcut
⌥ alt +
2 to open the menu.
Click on the node you want to open.
In case you do not find what you are looking for you can also use the search field in the menu.
Just type in the feature you are looking for (e.g. “New Sales Order”) and click the link to open the window.
To see the full menu, click on BROWSE WHOLE TREE.