Often when viewing an email, I find it necessary to be able to move it out of the way, out of the Proton window in order to complete a task while seeing the message contents. Example: I get an email confirming a webinar. I have to open calendar (which I also cannot move out of the Proton window) and go back and forth between mail and calendar so I can add the pertinent webinar information. That is just rather silly. Almost any other mail program allows you to pull the email selection away from the primary window. Please consider this modification.