You can add a draft article to a series before publishing or edit an already published article, adding the article to a series.
Note: The series should have already been created; learn how to create a series here.
Add draft article to a series.
In the process of publishing the article, navigate to the "Add to a series" section in the draft settings and select the series you’d like to add the article to from the dropdown.
Add published articles to a series.
Navigate to your dashboard and access the Articles tab to find all your articles. You can then edit the article and add your desired series to that article before republishing.
Once you’ve added the article to a series, you can previews the series from your dashboard. Here's an example of what a Series looks like on your Hashnode blogs:
