Where is the button to edit the variables?

As a paying user I have a questions.
Where to edit the variables?
<img width="1292" height="689" alt="Image" src="https://github.com/user-attachments/assets/1b3fc844-e9df-44ec-8d88-9ccc5ef315f8" />

Also in the bottom I don't see this option:
<img width="311" height="328" alt="Image" src="https://github.com/user-attachments/assets/0129ceb1-8cd8-4e5d-84a1-3cead90cdeb0" />