Users have the ability to add well-designed and creative timelines to their website using the popular Gutenberg page editor. 

To create timelines using the Gutenberg page editor, please follow the below steps:

1. Log into your WordPress admin page
2. Go to either the “Post” or “Page” section and click on the “Add New” button
3. On the page editor, click on the “Add block” icon
4. Type “Post Timeline Shortcode Generator” in the search bar, and select this block when it appears
5. Click on the “Add Shortcode” button
6. Make your preferred selections in the “Settings” tab and the “Post UI” tab
7. Click on the “Insert Shortcode” button when you are done
8. Click on “Publish” or “Update” to save the post or page

Once you are done, a Post Timeline shortcode will appear on the page editor. Moreover, you can look at a preview of the timeline you just added to your website.