You can edit a Routelet just like any other Route in the Integration perspective of Talend Studio.
You can make changes to a Routelet and get your changes reflected in the actual Route execution output.
To edit the Routelet, proceed as follows:
Double-click the Routelet you want to edit in the Route it is used in, or in the repository tree view.
The Routelet is automatically locked.
Make your changes on your Routelet.
Press Ctrl+S to save your changes.