i’m getting low pagespeed score on gtmetrix because of different image size used in homepage. i think it was caused by 1.10 gp premium plugin because when i made the web first time it wasnt there. i’ve read https://docs.generatepress.com/article/adding-image-sizes/ but still dont understand how to correct it in my website. Could you show me a way to generate different thumbnails? Will it make media library have many double image?