On desktop, the Composer has two modes: Normal and Maximized. The issue is that when replying to a message, the Composer overlays the email thread. This makes it frustrating to:
1) constantly scroll or minimize the Composer to view previous emails for context, or
2) manually drag the Composer to the left side for every reply.

Suggestions:
- Short term: Allow users to set a default Composer position (left or right side of the screen)
- Mid term: Redesign the experience so that replies are embedded in the email thread by default, using the pop-up Composer only as a fallback or a standalone setting option.