Google is the owner of the Blogger. Google provides many blogging tools for free to Blogger account holders. You can get many free templates or paid templates. You can also use third part templates. The format of the templateS is .XML. If you change your blogger themes, just upload the .XML file in your blog.
The Process to change blogger Template
Go to Blogger and log in your account. Then select your blog site. Now flow the instruction ……
STEP 1 : Select the Template in the left side menu .
STEP 2 : Now you can see the Backup/upload option in the top Right side corner.
STEP 3 : Select the Backup/Upload option. Choice Your template file only .XML format.
NOTE: Please ” Backup ” your old template.
Step 4 : Click upload and wait some time.
Now your blog template has been change.