Is it possible (Wordpress Template) to edit the Button form in HTML or insert a html script to the button that open when the button was Pressed ?

Hello, I want to create a 'click to call' button. If you click on it you'll call the number. Like this <a href>0 000 000 0000</a> How can I insert HTML into a Button in Themler?

Hi all, I am using Themler for HTML and am wondering how I can change the Button text "Continue Reading" on the Blog Landing Page. Thanks for your Time!