Totaly new to Magento and working with version 1.9.3.8. I tried to change the layout by editing the review.xml file present in the following path default/layout/review.xml. This is what my code looks like.

<review_product_view translate="label"> Catalog Product Review View page/2columns-right.phtml --> page/1column.phtml </review_product_view>

Even after updating this the changes are not reflecting. Am I missing something somewhere? Thanks in advance!