Hello,
Thanks for using XStore.
Try to add the next code in Theme Options > Theme custom CSS > Global custom CSS:
.product-view-light .light-left-side {
display: flex;
flex-direction: column;
}
.product-view-light .products-page-cats {
order: 2;
}
.product-view-light .product-title {
order: 1;
}
.product-view-light .star-rating {
order: 3;
}
.product-view-light .switcher-wrapper {
order: 4;
}
Regards