If you use Magefan Blog Extension for Magento 2 and need to change the layout e.g. from "2 columns with a right sidebar" to "2 columns with a left sidebar" for all blog pages, please do next:

1. Create a file


2. Add the code into it

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="2columns-left" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">

3. Save the file and flush Magento 2 caches.


For the layout attribute you can use such values as:
 - 1column
 - 2columns-left
 - 2columns-right
 - 3columns