How to perform that magic closing bracker trick?

[ghost]

Hi, Mair!( and all taking this course)
Just a short question, in lesson
wi-fi connect 5 error
at 5:30, while you were adding a pair of brackets,
you somehow magically moved the positon of the end closing bracket!
How did you do that?
Can you share me that awesome trick?

Zt.

[Mair]

Hi @ztliu
I think what you are referring to is is the "end" key" or ctr right-arrow