Custom URL menu items
Creating Custom Links within your Menu is super easy. You can use this feature to link to external shops, articles, proofing systems, etc. There are 2 steps you need to take:
1. Create a Custom Link – add in the external link and navigation label
2. Open Custom Link Settings – select Open Link In a New Tab – if you do not want users to leave your site
I don’t have this option
If you do not have the option to open the link in a new tab, expand your Screen Option Settings in the top right corner and enable Link Target.