what is the shortcut for move other tab
已回答
hello The shortcut to move within one tab is alt+←/→.
My question is, how do I move to another tab?
Based on the example below, what shortcut should I use to go from B.java to C.java file?

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The actions are called "Goto Next/Previous Splitter". You can assign custom shortcuts to them in the Keymap settings:
You can also use the tab switcher: press Ctrl+Tab and keep holding Ctrl to keep the Switcher window open. Then press Tab or Shift+Tab to navigate between the opened tabs/splits.