How to customize keyboard?

Excuse me for not responding immediately. I initially thought that as the plugin owner, I would be subscribed to messages here, but unfortunately, that wasn’t the case. To address your request for customization such as adjusting the keyboard’s size or scale, adding or removing characters, and showing only a numerical keyboard with arithmetic signs, you’ll need to tweak the JavaScript code. While the plugin is designed for easy extension, modifying the code to integrate new features like these is necessary. Extending the settings to accommodate such customizations is indeed a promising prospect. However, it’s not planned in the near future due to resource constraints. Thank you for your understanding.