jupyterlab/packages/help-extension/schema/plugin.json

{
  "title": "Help",
  "description": "Help settings.",
  "jupyter.lab.shortcuts": [
    {
      "command": "help:toggle",
      "keys": ["Ctrl Shift H"],
      "selector": "body"
    }
  ],
  "properties": {},
  "additionalProperties": false,
  "type": "object"
}