When reading long emails in the Proton Mail web interface, the message header scrolls out of view along with the email body. This makes it inconvenient to check important information such as the sender, recipients, or message date without scrolling back to the top.

It also makes accessing message actions unnecessarily cumbersome, as users have to scroll back to the top of the email to perform actions such as Reply, Forward, or any other available message action.

I would like to suggest keeping the message header permanently visible at the top of the reading pane while scrolling through an email, so that message details and actions remain accessible regardless of the scroll position.

Ideally, this behavior should be configurable in Settings, allowing users to enable or disable the sticky message header according to their preferences.