Adding the Font Resizer plugin at right side of the site logo in Beaver Builder theme. See the procedure at below:

Step 1: Install & Activate the Font Resize plugin.

• Login to Dashboard
• Navigate to Plugins-> Add New
• Search “Font Resizer”
• Click on “Install Now” button
• Now click on “Activate” button

Step 2: Setting the Site Header Layout

1. Login to Dashboard
2. Click on Appearance -> Customize
3. You will redirect to new page. Expand Header -> Header Layout section.
4. Select “Nav Bottom” from Layout drop down list
5. Select “None” from Content Layout drop down list
6. Click on “Save & Publish” blue button
7. Close the customizer.

Step 3: Adding some custom code

Open the functions.php file from your child theme folder and add the following code at end of the file:

Adding Font Resizer

add_action( 'fl_header_content_close', 'wpbw_add_font_resize' );
/**
 * Adding Font Resizer
 */
function wpbw_add_font_resize() {
	if(function_exists('fontResizer_place')) {
		echo '
' . __( 'Font Resizer', 'fl-automator' ) . '
';
		fontResizer_place(); 
	}
}

Step 4: Adding some custom CSS

This is optional. You will add the CSS based on your site design. I added following CSS in style.css file of my child theme:

CSS

li.fontResizer {
	list-style: none;
	text-align: right!important;
}

All are done. Now refresh your site and see the result.