After creating a series, follow the steps below to pin it to your navbar.

Step 1: Go to your blog's dashboard, and click on the "Navbar" tab visible on the left side panel.

Step 2: Click on the "Add an item" button.

Step 3: Select Series as the Type and choose the series to be added as the Value from the dropdown, as demonstrated below:

Step 4: Assign it a Priority between 0 and 999 to control the order in which it will be rendered on the navbar.

Note: Pages with higher priority numbers appear first, and others follow in descending order.

Step 5: Click on the "Save Navbar" button when you're done.

Step 6: Navigate to your blog, and your newly added series will be visible on the navbar, as shown below.