URL Component field is not available from the Image file in the File Cabinet
The Descriptive URL feature can make products easier to find on website and may help achieve better ranking with search engines. Note that it will only work if domain will be setup at Setup > Site Builder > Domains.
This feature will allow tab, category and item pages of users' website to use descriptive URL components of users choosing for search engine optimization.
To show the URL Component field on the image file page, please follow these steps:
1. Navigate to Setup > Company > Enabled Features.
2. Under Web Presence tab > Web Site, mark the checkbox for Descriptive URLs.
3. Click Save.