Newton_Editor/plugins/gtksourceview/markdown_preview/manifest.json

{
    "manifest": {
        "name": "Markdown Preview",
        "author": "ITDominator",
        "version": "0.0.1",
        "support": "",
        "requests": {
            "pass_events": "true",
            "pass_ui_objects": ["separator_right"],
            "bind_keys": ["Markdown Preview||tggle_markdown_preview:<Shift><Control>m"]
        }
    }
}