Again; once more; anew—doing something another time or redoing it (often to reconfirm).
改めて自己紹介させてください。
Let me introduce myself again.
後日、改めて連絡します。
I'll get in touch again another day.
改めて考えると、あの時の判断は正しかったと思う。
Thinking about it again, I believe that decision was correct.
Formally or deliberately—used when doing something in a formal, intentional, or emphasized way.
改めてお詫び申し上げます。
I would like to apologize again (formally).
改めて会議を招集して方針を決めることになった。
They decided to convene the meeting again formally to set the policy.