vscodeKeybindings.json

// Place your key bindings in this file to overwrite the defaults
[
  { "key": "shift+cmd+-",           "command": "workbench.action.openPreviousEditor" },
  { "key": "shift+cmd+=",           "command": "workbench.action.openPreviousEditor" },
  { "key": "shift+cmd+-",           "command": "workbench.action.quickOpenNavigatePrevious",
                                    "when": "inQuickOpen" },
  { "key": "shift+cmd+=",           "command": "workbench.action.quickOpenNavigateNext",
                                    "when": "inQuickOpen" },
  { "key": "shift+cmd+[",           "command": "editor.foldLevel2",
                                    "when": "editorFocus" },
  { "key": "shift+cmd+]",           "command": "editor.unfoldAll",
                                    "when": "editorFocus" },
  { "key": "cmd+1", "command": "workbench.action.openEditorAtIndex1" },
  { "key": "cmd+2", "command": "workbench.action.openEditorAtIndex2" },
  { "key": "cmd+3", "command": "workbench.action.openEditorAtIndex3" },
  { "key": "cmd+4", "command": "workbench.action.openEditorAtIndex4" },
  { "key": "cmd+5", "command": "workbench.action.openEditorAtIndex5" },
  { "key": "cmd+6", "command": "workbench.action.openEditorAtIndex6" },
  { "key": "cmd+7", "command": "workbench.action.openEditorAtIndex7" },
  { "key": "cmd+8", "command": "workbench.action.openEditorAtIndex8" },
  { "key": "cmd+9", "command": "workbench.action.openEditorAtIndex9" }
]