Insert custom Whatsapp button

Instead of using whatsapp to share with others, I wish to use this as a buttom to contact me through whatsapp. here goes the buttom to be used:

What is the code to be used and which is the file to be changed?

• This topic was modified 4 years, 2 months ago by alexrsantos.

The page I need help with: [log in to see the link]