A method and a system for displaying conformal synthetic data on a scene over a head-mounted see-through display (HMSTD) having a line of sight (LOS) are provided herein. The system may include: a tracker configured to track the LOS of the HMSTD; a display controller configured to display on the HMSTD a first display area comprising a synthetic image data conformal to a scene viewed from the HMSTD; wherein said display controller is configured to receive a desired point being a point within the scene which intersects the LOS of the HMSTD and to display a second display area on said HMSTD, wherein the second display area is positioned relative to said desired point, wherein said synthetic image data is displayed over the HMSTD at a reduced intensity on an overlap area between the first and the second areas.