Cross-hairs and camera image overlay

[JTW]

We are working on the dashboard for LabView and the camera image on it. We are trying to figure out an easy way to overlay an image on the camera section, like a cross-hair. We would like to know the easiest way to overlay a cross-hair on the the image section and to also know if there's a way to add buttons to the dashboard to toggle between different overlaying images (like switch between different kinds of cross-hairs depending on which button is pressed).