'how to auto focus editor on Xcode

I am new on Xcode and crazy using vim mode for everything. On Xcode, whenever I switch to different tab on editor view I have to use keyboard shortcut command + J to show move focus to editor and click enter then continues to use vim. Is there any internal setting or another way for me to just focus on new tab file after switch different tab file?

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Solution 1:[1]

Ctrl+Tab shows the one next to the current tab.

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Solution Source
Solution 1 Jeremy Caney