Magento 2 - Extend Extension Layouts and Templates

Question

Is there a way to extend the layout and template files of an extension? Say I have an extensions file located at app/code/<vendor>/<extension/view/frontend/layout or a file located at app/code/<vendor>/<extension/view/frontend/templates, how would I extend/override those files in my own custom theme?

Answer 1

You create a directory in your theme directory that matches the desired module, for example Vendor_Extension. Inside this directory you make the layout and templates directories where you put the .xml/.phtml files to be extended/overridden. These files must use the same name as their target file. If the target template file is in a subdirectory, must also duplicate the subdirectory structure.