Step 2. Log in to your Blogger’s dashboard, then go to LAYOUT -> EDIT HTML
Step 3. It’s best that your backup your old template (just in case any thing goes wrong), by clicking on the “DOWNLOAD FULL TEMPLATE” link and then save the file to your hard disk drive.
Step 4. Once you have created a back up, upload the new template by clicking the ‘Choose File’ button. Select the file’s source and click ‘UPLOAD’,
Step 5. After the upload is complete , you can either which to preview your template or click on the ‘SAVE TEMPLATE’ button to start using it.