Set the default sort direction for Magento category pages

On Magento while listing categories you can sor the available products: By price, name or relevance, and ascending or descending. By default sorting of (price, name or relevance) can be configured from magento backend under catalog section however we can’t change the default sort order. Here is a XML layout update that allows you to do this as per your requirement. XML-layouts are part of the Magento theming system. XML-updates can be applied in the GUI (for products and categories) [...]