Customize bootstrap theme ojs 3.1 (Header, etc)

Hi, I am using bootstrap3 theme and I would like to change the button and box “search” from header.tpl with default theme.

I tried to change from file: plugins/themes/bootstrap3/templates/frontend/components/header.tpl

{* Search form *}
     {if !$noContextsConfigured}
         <div class="pull-md-right">
             {include file="frontend/components/searchForm_simple.tpl"}
         </div>
     {/if}

I copied default template templates/frontend/components/searchForm_simple.tpl on my theme: plugins/themes/bootstrap3/templates/frontend/components/searchForm_simple.tpl

I tried to copy files from default theme and changed paths but it’s still not working
plugins/themes/bootstrap3/BootstrapThreeThemePlugin.inc.php

$this->addScript('popper', 'bootstrap/js/popper/popper.js');
$this->addScript('bsUtil', 'bootstrap/js/util.js');
$this->addScript('bsDropdown', 'bootstrap/js/dropdown.js');

Can any one help me ?

Regards,
xavi

Hi.
Bootstrap 3 theme Archive page 1 column. I want to make 3 columns. How can I do it?

I like how you arranged your footer in three columns on https://ulumuna.or.id/. Can you assist with what you did?