With the help of Designer Tool your customer can design and customize the product according to their preferences. In this article you will get to know where you can set the label of the designer tool.
Login To Backend
Navigate to Stores -> Settings -> Configuration.
You will land on the Configuration page. Here, go to PrintXpand -> Product Designer Settings -> General.
In General, there is a Design It Label section where you can add your label for the Design It button.