Shortening product development cycles demand increasingly efficient methods and tools for the planning of complex production systems. Recently, augmented reality (AR) technologies have been introduced in manufacturing planning functions. Working in augmented environments, users usually select virtual objects with hand gestures that are associated with arm fatigue. In the first study, a mixed reality (MR) application for inspection and validation of a production line has been developed. The application allows to show the virtual environment in Augmented/Mixed Reality, and it allows to import three-dimensional (3D) CAD with information and structure in a specific position. The application makes the user interacting with the scene through a user-friendly user interface (UI) and changing the position of 3D objects in the space.