Dear Rose,
thanks for your answer!
Now I’m a bit confused. I tought that the 8theme product slider uses the shop catalog image size, as I found this code in content-product-slider.php:
$thumbnail_image = wp_get_attachment_image_src( get_post_thumbnail_id(), apply_filters( 'single_product_archive_thumbnail_size', 'shop_catalog' ) );

I have set the thumbnail width in customizer to 420px so that works fine for my shoppage and also for the related products slider. But for my related color slider, I only need the images in 70x70px. As said, the 420px images are scaled down to 70px, so it all looks good, but its not the best solution for performance. Thats why I suggested the possibility to set a custom image size for each slider.

You have this settings popup:
http://www.bilder-upload.eu/show.php?file=4a4982-1525687411.jpg

And it would be great for performance, if there was the possibility to chose a custom image size (e.g. the thumbnail size I set under media > settings), like here in single image settings:
http://www.bilder-upload.eu/show.php?file=298ae5-1525687629.jpg

Kind regards!

Ah just one more general question: I saw that Royal theme is on sale for some weeks. Is this just a usual sale or does this mean that the theme will no longer be developed??

On post pages. I have commented out the following code in etheme.js and that worked, but I dont know if thats a good way or if there is a better solution I could implement in my childtheme:

    // **********************************************************************//
    // ! Images lightbox
    // **********************************************************************//
    $("a[rel^='lightboxGall']").magnificPopup({
        type:'image',
        gallery:{
            enabled:true
        }
    });

    $('.images-popups-gallery').each(function() { // the containers for all your galleries
        $(this).magnificPopup({
            delegate: "a[data-rel^='gallery']", // the selector for gallery item
            type: 'image',
            gallery: {
              enabled:true
            }
        });
    });

    $("a[rel='lightbox'], a[rel='pphoto']").magnificPopup({
        type:'image',
        closeBtnInside: true,
        preloader: false,
        midClick: true,
        removalDelay: 300,
        callbacks: {
            beforeOpen: function() {
                this.st.mainClass = 'my-mfp-slide-bottom effect-delay2';
            }
        }
    });

Ok great to know. Thank you.

I just noticed that there seem to be general problems with owl slider. On small devices, the navigation-arrows are not shown. Ive added a video in private content. When I then switch from small device to desktop size, the arrows are back but the pictures that where hidden are not shown. That happens in product gallery, as well in related product slider, so I guess there is a bug in owl slider. Maybe fixing this bug will help me fixing the short description issue too. Could you please help me with that?
Many thanks in advance

Yes thank you its all working fine now. The only thing thats a bit disturbing is that the images “jump” on single product page – Ive added a video in private content.

Hm ok i am on the way to my office and will check it there. Also there seems to be a new image size with 250px (shop catalogue). I checked all settings (in settibgs > media) and in customizer but I dont find where to change it?

Thank you. Can you please fix it for content-product-slider.php too?
And will this be fixed in the next update? The perfect solution would be if it was like it was before: Show the swap image if there is one, and if there is none, just do nothing and keep the main product image.
Thank you.

Thank you, that would be ok but now there are multiple error messages on the shop page :/

Thank you but now it shows the second product gallery image as hover image and not the one that I set as hover image..

Just wanted to admit that the hover (swap) images have not only disappeared from shop page, but also from the etheme (related products) slider…

Ok, hoping that the update will fix this. Downgrading is not that easy because the new woocommerce version made database changes. But I could use a backup..

Solved it. By default, woocommerce doesnt change the price to the correct price, its always 25-39 Euro. But I am using a plugin that does the trick. I just had to remove

<div class="product-arrows pull-right">
<?php previous_post_link_product(); ?>
<?php next_post_link_product(); ?>
</div>

from content-single-product.php in order to make it work. Guess it’s related to the position of this function…