CodeSandbox 상단 메뉴 appearance 설정.

View > Appearance > Toggle Menu Bar

🔧 Setting

1. "Ctrl+Shift+P" or click "Show Opened Editors"
2. "> toggle menu bar"
3. 짠! 다시 나타난 menu bar

[참고] https://github.com/codesandbox/codesandbox-client/issues/1982