How to sort articles by the Oldest and Newest?

Desktop

On any of your feeds or folders selected, click on settings icon which is on action bar at the top right of your screen.

This will prompt a dropdown menu to appear. Within this menu, you can select either "Newest" or "Oldest" from the default sort section.

Mobile

For mobile users, to access settings for any selected feeds or folders, tap on the settings icon located in the action bar at the top right of your screen.

This will bring up a bottom sheet menu where you can choose either "Newest" or "Oldest" from the default sort section.