why my template layout was not use

red square sentences is “righr sidebar <br/>(defult)”

The theme developer can help with this issue

If you have created the theme, ensure that the get_sidebar is appropriately referenced

@luckychingi get_sidebar is appropriately referenced ,where find it ,”functions.php”?

Is register_sidebar added in functions.php and does the name matches the function call on your php page?

on the php pages, add a marker and check if WordPress finds your sidebar

<?php if ( is_active_sidebar( 'sidebar-1' )  ) : ?>
Sidebar Found
	<aside id="secondary" class="sidebar widget-area" role="complementary">
		<?php dynamic_sidebar( 'sidebar-1' ); ?>
	</aside>
<?php endif; ?>

The above script should display ‘Sidebar Found’ above the sidebar content