In this tutorial we will discuss about the topic how to override default theme template files in magento 2. I am assuming that you are already familiar with magento 2 and has the know how, how things work in magento 2. So i will directly switch to our topic, and if you are not familiar please start from the basics.Having said that lets come to our topic, so if you are doing the custom theme then you must know how to Override default theme template files in magento 2,in your custom theme.And if you want to override all the files then simply go to.
And copy the templates folder in your theme. In my case theme name is “theme”. So go to my theme folder and create the Magento_Theme Folder. And paste the templates folder there. Now your theme structure will look like this.
If you want to override the single file like header.phtml. Then copy the file from
Paste it in your theme.And the file structure then will look like this