# Opening a jupytext-powered notebook under jlab

**URL:** <https://discourse.jupyter.org/t/opening-a-jupytext-powered-notebook-under-jlab/9545>\
**Category:** JupyterLab\
**Created:** [June 10, 2021, 8:15am UTC](https://discourse.jupyter.org/t/opening-a-jupytext-powered-notebook-under-jlab/9545 "2021-06-10T08:15:01Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![parmentelat](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/parmentelat/32/813_2.png) [@parmentelat](https://discourse.jupyter.org/u/parmentelat)\
**Post date:** [March 11, 2022, 1:28pm UTC](https://discourse.jupyter.org/t/opening-a-jupytext-powered-notebook-under-jlab/9545/5 "2022-03-11T13:28:00Z")

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right now this is working for me under jlab

for the record, I can’t retrieve where exactly I got this recipe from, but here’s what i have in place

```auto
cat ~/.jupyter/labconfig/default_setting_overrides.json
{
  "@jupyterlab/docmanager-extension:plugin": {
    "defaultViewers": {
      "markdown": "Jupytext Notebook",
      "myst": "Jupytext Notebook",
      "r-markdown": "Jupytext Notebook",
      "quarto": "Jupytext Notebook",
      "julia": "Jupytext Notebook",
      "python": "Jupytext Notebook",
      "r": "Jupytext Notebook"
    }
  }
}

```

this won’t work for retrolab though…

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