If you want to edit the individual product pages you can select the ‘Product’ option from the ‘Theme Settings’.
You can enable or disable the ‘Instant Add to Cart’ option.
You can also add swatch options to the product page. Either by enabling swatches that are updated by the theme automatically (click on ‘View documentation link’ for a detailed explanation) or by using uploaded images instead of HTML colors. But to upload your own images you need to make sure you follow the rule stated.
For out-of-stock items, you can also hide them.
You can also show or hide the ‘Recently viewed product’ and change the heading of the section to your suit your website.