How to use Vivaldi's Reading List on Android
Here's how it works on mobile devices. To add a page to the reading list on your phone, visit the article that you want to save, and tap on the Vivaldi icon to view the app's menu. You can access the Reading List from this drop-down panel. Tap on the "Add Current Page" button to save it to your Vivaldi Reading List.
Just like its desktop counterpart, the mobile version lists the titles of your saved pages along with the favicon of the site. Selecting a saved article from the list will open the corresponding page in the app. When a page is accessed, the browser will automatically mark the item as Read.
For reference, the links that appear blurry (grayed-out) in the Reading List panel indicate those that you are done with, these are listed in the Read Articles section, at the bottom. Your Unread pages will remain highlighted at the top of the list. You can manage the read status of the articles manually too, which can be helpful if you want to mark a page as unread or vice-versa. Tap the three-dot menu icon next to a saved item to mark the article as read, or if you no longer need it, you can choose to delete it from the list. You may select multiple items in the list and manage them at the same time.