Step 01: Go to the "Admin" module and select the “Manage Settings” from the drop-down list.
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Step 02: In this “Admin” tab, click the "Manage Template" option.
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Step 03: Then select the template from the drop-down list and click the “LOAD TEMPLATE” button. 
Step 04: From here edit the changes and click the"SAVE" button at the top rightmost corner of the grid to update the changes.