[racket] Switching from editor to repl

Hi,
I am new to racket (but am really excited by the idea - everything is a
program) - need a quick help with Dr Racket -

What's the keyboard shortcut to switch between editor and repl?

I got to know from a video on youtube that I could use C-e to toggle the
repl visibility but not able to find out how to get to the rpl using the
keyboard.
Regards,
Kashyap
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