VS Code Key Binding for quick switch between terminal screens?

If you want something that might feel a bit more fluid than using arbitrary key bindings, you can get Ctrl+Tab and Ctrl+Shift+Tab working for both editor switching and terminal switching.

Open your keybindings file with ctrl+shift+p search for Open Keyboard Shortcuts (JSON). Then add..

{ 
  "key": "ctrl+tab",            
  "command": "workbench.action.openNextRecentlyUsedEditorInGroup",
  "when": "editorFocus" 
},
{ "key": "shift+ctrl+tab",      
  "command": "workbench.action.openPreviousRecentlyUsedEditorInGroup",
  "when": "editorFocus" 
},
{
  "key": "ctrl+tab",
  "command": "workbench.action.terminal.focusNext",
  "when": "terminalFocus"
},
{
  "key": "ctrl+shift+tab",
  "command": "workbench.action.terminal.focusPrevious",
  "when": "terminalFocus"
}