Hello,
Thanks for using our theme.
1/ Please check this topic https://www.8theme.com/topic/turn-off-tooltips-text-on-single-product-page-images/
2/ Read about image size settings – https://xstore.helpscoutdocs.com/article/89-product-images
Theme Options > WooCommerce > Single Product Builder > change width of section that contains the gallery https://prnt.sc/1wh0pqm
Regards