You can enable some advanced navigation features by editing your theme's code:
Add breadcrumb navigation to let customers know where they are in your store.
Adding a menu to your Shopify store to show more links in your navigation menu.
Adding a sort order menu to collections allows visitors to choose different display orders for products.
Adding Swiftype to enable a richer search experience on your Shopify store.
Linking product options to update secondary product menus with the customer's current menu selection.
How to make links away from your store open in a new tab or window of your customer's browser.
Editing your search function to show only products when a customer searches for something in your store.
Enable the use of non-English characters in drop-down menus, by customizing your Shopify theme.
Before you customize your theme, make sure you understand what level of support to expect.
We can help if you have trouble with supported customizations. You can chat, email, or call us any time.
Unsupported customizations fall outside the scope of our support service. This means that we’re not able to help you if you run into problems. The good news is that we’ve classified each tutorial according to its level of difficulty, to help you decide whether to attempt it on your own. There’s also a growing community on our forums - you’ll often find friendly and helpful advice there.
You could also consider hiring a Shopify Expert to do your customizations for you.