How to change whatsapp chat settings?

This feature allows you to change the look and feel of Whatsapp chat button settings according to your way.
You can change Whatsapp chat button design, position, color, background color, text, text color, text background color according to your wish.
You can customize the header and footer message whatever you want to display to your customer.
You can customize text message which customer can send by default and also they can edit the text message. Also, there is a feature if you want to include the current URL to the message to check products/pages in your store customers are visiting.

How to change whatsapp chat settings?