Gmail’s conversation view was groundbreaking when it appeared 15 years ago, but it always shows new messages on the bottom of the thread instead of the top. That’s annoying to some long-time email users. Here’s how to change that.
There’s No Easy Option to Change This
Unfortunately, Gmail itself provides no easy one-click option that will put all new messages on the top of a conversation thread. Microsoft Outlook and Apple Mail both show new messages at the top of a conversation thread by default, but they offer an option to put those messages at the bottom. We wish Gmail would do the same.
But, although Gmail doesn’t make it as easy as we’d like, there are still ways to see new emails on top in Gmail.
Option One: Turn off Conversation View
If you’re not that into using the conversation view, the simplest solution is to turn it off. If you do this, then each email appears individually rather than together in a conversation thread. This is the only built-in option for seeing new mail at the top of your inbox.
To disable conversation view in Gmail, click the cog in the top right on the Gmail website and then click “Settings.”
On the General tab that opens, scroll down to the Conversation View option and then select “Conversation View Off.”
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Source : How to See New Emails on Top of Gmail Conversation Threads