# Hidden Features

Ok, now they are no longer hidden :).  
This section contains small setting options that the majority of users do not change or change very rarely and therefore saved the effort of creating an elaborate settings interface.

Create a `dev.json` in your filemanager.

## JSON Properties

The JSON object has the following properties:

| Key | Type | Description | Default |
| --- | ---- | ----------- | ------- |
| `bootsound` | string | Uses a custom melodie while booting |  |
| `uppercase` | boolean | Print every character in uppercase | `true` |
| `temp_dec_places` | int | Number of decimal places for temperature measurements | `0` |
| `color_correction` | array of int | Sets the colorcorrection of the matrix | `[255,255,255]` |