How to edit HTML in WordPress

Hi there,

I would like to be able to access a site’s HTML in WordPress in order for fine editing/customization. At the moment, to access the HTML of the page I am going to Chrome Developer tools where I can see all the html for the site in the bottom left-hand window. But when I try and access it from the WordPress dashboard, all I can find are files such as ‘single.php’, which are written using php loops and I cannot seem to trace where the original html elements are.

For example, for changing the number of columns in a contact form ‘message’ box.

Any ideas? Is there a plugin that can help me with this?

Regards,

Robert Young.