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mynode/readme/api/references/development_mode.md
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# Development mode
When experimenting with Joplin, for example when [developing a plugin](https://github.com/laurent22/joplin/blob/dev/readme/api/get_started/plugins.md) or trying a theme, you might want to run Joplin in development mode. Doing this will open a second copy of Joplin using a different profile with test notes and notebooks, so you can experiment without risking changing or deleting your data.
To enable Development Mode, go to **Help > Copy dev mode command to clipboard**. This will copy a command to your clipboard. Paste this command in a shell / terminal to run a development version of the app.