Hello,
It is much easier to change width using css than change a few template files.
I have added the following code in your custom css:
/*--- Single product page custom---*/
@media (min-width: 1200px) {
.single-product-wide .product-images.col-lg-6.col-md-6 {
width: 40%;
}
.single-product-wide .product-information.col-lg-6.col-md-6 {
width: 60%;
}
.col-md-9.product-content.sidebar-position-right {
width: 80%;
}
.col-md-3.single-product-sidebar.sidebar-right {
width: 20%;
}
.single-product-wide .product-information-inner {
width: 75%;}}
.sidebar-slider li {width: 100%;}
If you want to change number of products per view for your upsell slider you need to copy etheme_create_slider_widget function (xstore/framework/template-elements.php) in child theme functions.php and change it. It shows 4 items by default.
Regards