You can change admin or, add a new admin to blog by this method. You can add new authors to blog, too.
How To Change Login Email Address (admin) in Blogger
2. Go to "Settings" and, click on "Basic".
3. Go to "Permission" section and, click on "+Add authors" under "Blog Authors". Now, you can see a blank field (see below picture).
4. Type the email id which you want to add and, click on "Invite" button.
5. Next, new email id will receive an author invitation email. You have to accept it from your new email. If it is other person's email, tell him to accept it.
6. After that, go to your blogger dashboard and, go to "Blog Authors" option again. Then, you will see, new email is added. But, it acts as the author.
7. To make admin, change it from "Author" to "Admin". Now, both old email id and new email id will act as admin of the blog. If you want to, delete old email, click on the cross mark (×). If you want to make old email only author, change it from "Admin" to "Author".
ConversionConversion EmoticonEmoticon