So you've decided to modify your store Shopify theme. Congratulations! It's easy to tweak small pieces of the theme, if you know where to look.
Here I have a demo store with the Dawn theme. There are two parts that are important today.
I grayed out everything but the preview pane. It shows what the theme will look like.
This is the theme editor. It contains everything in this page of the theme. Since we're on the home page, this is the first page that customers will see when going to your store. Now, let's sprinkle on some magic!
Find this button near the top of the page:(), we can click on most pieces of the theme and that piece will be shown in the theme inspector. So, let's look at changing the large picture at the top of the page. It's called the hero image.