Hi,
Thanks for your patience, I only asked for access to your test page so we would be looking at the same thing and so I would  not need to recreate your layout on my site, nonetheless I created 1/5 + 3/5 + 1/5 columns with a gallery with large image on top and thumbnails below, and a color section with 100% min-height below that to simulate the rest of the page.

My sticky header is 90px, although I see yours is 157px.
My first impression of the layout is that the large gallery image on top is almost the full height of the screen, so the thumbnails are not really seen, I added 50px right & left padding to the 3/5 column and that helped a little

Adding 150px right & left padding to the 3/5 column was better

but I get the feeling that you want the large image to be as large as possible, and not so much empty space on the sides, so having it sticky would make the thumbnails hard to see. I tested Guenni007’s solution at: https://webers-testseite.de/ajax-gallery/#av_section_2 and other than adjusting the top: 70px to match my header it seems to work well.
But ypur current masonry layout https://www.thomashenthorne.com/26-mooring-road-san-rafael-ca/#av_section_42
seems much better because the user can see the thumbnails, it fills the page and the user can easily navigate the lightbox images (slideshow).

Best regards,
Mike

Hi,

Thank you for the inquiry.

We replaced the iframe with the video tag, which should display a thumbnail or video cover by default using the poster attribute and have the video controls enabled automatically.

<video width="100%" height="1000" controls poster="https://www.timm-tiegelkamp.de/wp-content/uploads/2026/02/Danny-Videocover-Foto_Web.jpg">
    <source src="https://2026-02-eins.s3.eu-north-1.amazonaws.com/Ronald-Video.MP4" type="video/mp4">
    Your browser does not support the video tag.
</video>

Best regards,
Ismael

Hi,

Did you add the intermediate_image_sizes_advanced filter? All we added to the functions.php file is the avf_alb_lightbox_image_size filter, which replaces the thumbnail with the full or original image.

If you add the intermediate_image_sizes_advanced filter, no thumbnails will be generated for uploaded images and all elements will use the full size regardless of the viewport size or device.

Installing an image compression plugin, such as WP Smush, should help optimize file generation.

Best regards,
Ismael

Hey es.design.ma,

Thank you for the inquiry.

The first post is currently showing a thumbnail instead of the original image. Did you install any image or media library plugins? Please provide the login details in the private field so we can check further.

Best regards,
Ismael

Hi,

Thank you for the information.

On the “logos-3-2” page, the images seem to be displaying at their original size. If you’re referring to the images inside the lightbox or image modal, you can add the following code to the functions.php file to display the original image instead of the default “large” thumbnail.

function avf_alb_lightbox_image_size_mod( $size, $context ){
  if( $context == ('av_gallery' || 'avia_masonry') ){
    return 'full';
  }
  return $size;
}
add_filter( 'avf_alb_lightbox_image_size', 'avf_alb_lightbox_image_size_mod', 10, 2 );

If the issue persists, please provide a screenshot of the issue using platforms like FreeImage, ImgBB, PostImages or Dropbox to upload and share the screenshot. Here are the steps to follow:

1.) Visit the website of your chosen platform, such as Savvyify, ImgBB, PostImages or Dropbox.
2.) Locate the option to upload a file or an image.
3.) Select the screenshot file from your computer or device and upload it to the platform.
4.) After the upload is complete, you will be provided with a shareable link or an embed code.
5.) Copy the link or code and include it in your message or response to provide us with the screenshot.

Thank you for taking the time to share the screenshot. It will help us better understand the issue you’re facing and provide appropriate assistance.

Best regards,
Ismael

Hi,

Thank you for the update.

Please note that thumbnail generation is primarily handled by WordPress core, not the theme itself. WordPress automatically creates multiple intermediate image sizes upon upload. While themes (including Enfold) can register additional image sizes or adjust quality settings, the actual generation process is managed by WordPress.

If you would like to disable the creation of thumbnails or other image sizes, you can add the following filter to the child theme’s functions.php file. Please make sure to create a full site backup before proceeding:

add_filter('intermediate_image_sizes_advanced', '__return_empty_array');

Best regards,
Ismael

Hey Dave Chapple,

Thank you for the inquiry.

The theme actually increases the compression quality compared to the default, which can sometimes result in heavier thumbnails or thumbnails with a larger file size than the original images. This is not intentional, but it can happen from time to time.

Please create a test page and provide the URL in the private field so we can check the issue — screenshots would also be helpful.

To adjust the default quality, try to add this filter in the functions.php file, then regenerate the thumbnails.

add_filter("avf_jpeg_quality", "avf_set_quality_mod", 9999, 1); 
add_filter("avf_wp_editor_set_quality", "avf_set_quality_mod", 9999, 1); 
function avf_set_quality_mod($quality) { $quality = 60; return $quality;}

Use this plugin to regenerate the thumbnails, but make sure to create a site backup first.

— https://wordpress.org/plugins/regenerate-thumbnails/

Best regards,
Ismael

Hi,

Thank you for the update.

Please note that 300x300px will not be the exact size at which the thumbnails are generated. The resizing process also takes the image’s aspect ratio into account, so if the image is not perfectly square or has a different aspect ratio, it will not be resized to exactly 300x300px. This is why you’re seeing images with different dimensions.

If you want to display a grid with uniform image sizes, you will need to upload images with the same dimensions and aspect ratio. Hope this clear things up a bit.

Best regards,
Ismael

Hey daninap,

Thank you for the inquiry.

You can change the size of the thumbnails used in the gallery by adjusting the Styling > Gallery > Gallery Preview Image Size setting. Please refer to the screenshot below.

Best regards,
Ismael

Hey steve159159,

Thank you for the inquiry.

You can use this filter in the functions.php file to adjust the default size of the lightbox image.

function avf_alb_lightbox_image_size_mod($size) {
  return "full";
}
add_filter('avf_alb_lightbox_image_size', 'avf_alb_lightbox_image_size_mod', 10, 1);

This defaults to large and we set it to full (the original size of the image). You can also remove this filter and adjust the size of the Large thumbnail in Settings > Media panel. You’ll need to regenerate the thumbnails afterward.

— https://wordpress.org/plugins/regenerate-thumbnails/

Best regards,
Ismael

Hey Sonno,

Thank you for the inquiry.

You can use this css code to control the height of the slider.

#top .avia-fullwidth-slider, #top .avia-fullwidth-slider ul li {
    height: 50vh;
}

We recommend adding a Custom CSS Class name to the slider element and adjust the css rule accordingly so it applies only to this specific slider.

— https://kriesi.at/documentation/enfold/add-custom-css/

Make sure the size of the selected thumbnail is appropriate to the size and aspect ratio of the modified slider.

Best regards,
Ismael

Hey Antonio,

Thank you for the inquiry.

You can use the Masonry element with the Styling > Masonry Settings > Size Settings set to Flexible Masonry. Another option is to use the Column elements to create rows of Image elements, allowing you to control which image size or thumbnail is used. Let us know if you need more info.

Best regards,
Ismael