Hello 
Can anyone please tell me how to make my banner image responsive, so that it shrinks when viewing on a phone, to fit the width of the screen? I’m on radiant theme.
The banner shows on every page by the way, not just home page, in case that’s relevant.
Thankyou 
The URL is https://josephinedellow.myshopify.com/
Hi @Jojo_pudding
Let add this Custom CSS to your theme Settings:
.image-for-homepage .img-container img{
max-width: 100%;
}
it will display beautiful on every screen
Thanks for your reply. Which page of code do I need to add this to please?
I tried pasting in theme.liquid but it didn’t change anything, was that the wrong place?
let go to edit code and find file assets/base.css.
Add my code suggestion to the end of that file
@Jojo_pudding please add this css given by @BiDeal-Discount to the very end of your base.css file and check,
Shopify Admin → Online Store ->Theme → Edit code → base.css
Hooray, that worked! Thankyou! 
you’re welcome. Let me know if you need any other assistance 