Hi to all. I need to display a crosshair as pointer in each axis I have in my GUI. When I click with mouse on a axis, crosshair must positioned itself on the correponding points in the other axis. I'm working on 3 dimensional medical images displayed in three projections (x-y, x-z, y-z), so when I click on a axis (for example the x-y axis), I want that my crosshair goes to the corresponding points in the other axes (x-z, y-z) Anyone is interested to my problem, can contact me to firstname.lastname@example.org and I can send him some images to explain my problem. Thank you in advance. Luigi.