Changing product page.

I’m a novice when it comes to Magento layout files.

I am trying to customize a theme.

I have created a catalog_product_view.xml file in app/design/frontend/Local/custom_theme_name/Magento_Catalog/layout folder.

my .xml file looks like this:

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<?xml version=”1.0″?>
<page *layout*=”1column” *xmlns*:*xsi*=”http://www.w3.org/2001/XMLSchema-instance” *xsi*:*noNamespaceSchemaLocation*=”urn:magento:framework:View/Layout/etc/page_configuration.xsd”>

<move *element*=”product.info.description” *destination*=”product.info.main” *before*=”product.info.addto”/>
</page>

However, I don’t see any changes on the group product page. Even after clearing the cache.

Any advice?

Also, I need a good reference on how to construct these layout files.

At present, my objective is to remove the description tab and move the description content under the product title (near the top of the page)