If you have downloaded a skin pack (a ZIP file), here is the standard procedure to install it:

For DJs, the interface is more than just software—it is the cockpit. While VirtualDJ 2021 is renowned for its powerful stems engine and smart mixing algorithms, the default interface might not suit every DJ’s style or workflow. This has led to a massive demand for custom interfaces, specifically "skin packs," allowing users to customize their digital workspace.

: On Windows, go to Documents\VirtualDJ\Skins . On macOS, it is typically in /Users/[YourName]/Library/Application Support/VirtualDJ .