To create custom URLs on Drupal 8, follow these steps:
1. Navigate to the “Content” section of your Drupal 8 site.
2. Click on the “Add content” button and select the content type you want to create a custom URL for.
3. Enter the information for your content, such as title and body text.
4. Scroll down to the “URL path settings” section.
5. Select the “Custom URL” option.
6. Enter the custom URL you want to use for this content. It should start with a forward slash (“/”).
7. If desired, you can also set up URL redirects from the old URL to the new custom URL by selecting the “Redirect” option and entering the old URL.
8. Click the “Save” button to save your custom URL.
Your content will now be accessible through the custom URL you have created.