I am currently working on a graphical application. Java uses the GUI builder that comes with NetBeans.
However, I found some strange error / function, since I can no longer see a window that allows users to switch between the “source” and the “design” (Design is dragging and dropping the NetBeans GUI-Builder, and the source is the code in which you can add your own methods, etc.).
NOTE: red is censored information that is not needed.

When I right-click on a component to add an event code, it returns me to the source code (without a window, so that I can return to design, it returns to design when I close and reopen it). Therefore, I know that NetBeans recognizes that it is indeed a JFrame form with the NetBeans GUI designer, and the source code is indeed available.
I could not find the answers to this question on this site or on the Internet, I tried to reset the windows, but it did not work, I also could not find the window when I clicked on the window option. I am sure there is a simple question, but I cannot find it. Please forgive me if this was a simple question.
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