To change default pre selected sidebar position in The7 and Armada

functions.php

function dt_change_default_sidebar() {

	global $DT_META_BOXES;

	if ( $DT_META_BOXES ) {

			if ( isset($DT_META_BOXES[ 'dt_page_box-sidebar' ]) ) {
				$DT_META_BOXES[ 'dt_page_box-sidebar' ]['fields'][0]['std'] = 'left'; // use disabled to disable sidebar 
			}
		
	}
}
add_action( 'admin_init', 'dt_change_default_sidebar', 20 );


Update (Cotober 2020): You can now use the preset settings, please refer to
https://support.dream-theme.com/knowledgebase/change-default-sidebar-position/

DO not edit nor hack the code, if you want you're sidebar to be on the left across the theme, here is what I did:

add_filter( 'presscore_main_container_classes', 'apyc_sidebar_default_left', 1 );
function apyc_sidebar_default_left($classes) {
   return isset($classes[0]) ? $classes[0] = 'sidebar-left':$classes;
}

Great solution !!!! Thank you.

it is not working!

does anyone have a solution to make the default disabled? Tried editing the filter and did not work out

You're a genius!!! Thank you.

add_filter( 'presscore_main_container_classes', 'apyc_sidebar_default_left', 1 );
function apyc_sidebar_default_left($classes) {
return isset($classes[0]) ? $classes[0] = 'sidebar-left':$classes;
}

You saved my day, Thank you.

This is an old hack, You can now use the built-in preset settings to change default sidebar postion, please refer to documentation
https://support.dream-theme.com/knowledgebase/change-default-sidebar-position/