Customizing ZWNJ button in simple (.txt) format

[nekoedges]

How can I edit/add ZWNJ button next to space bar and bind something to it? I'm using simple layout format (in .txt), is it possible or should I switch to .json format?

[BlackyHawky]

To add this key after the space bar, you need to edit the functional keys in the advanced settings.

By default, it's in JSON format.

To add the key, write after { "label": "space" }, :

    { "label": "zwnj", "type": "function", "width": 0.1 },