A dot with custom position on screen

So if you know about 3rd-person shooters, some of them don't have a cross and you have to predict where you shoot. Some people use a transparent tape with a marker dot to aim and I do that too, its funny I know.

So I was looking possible for some code or program that I could run to adjust the dot automatically when the program is run and it would over-ride in the game.

Solution 1:

You can build a small Lego construction to hold a laser pointer and position it such that it marks the "aiming point" on your screen.

With a slightly more complex set-up you can also make a Blutooth-controllable one, so you can even adjust the position directly with your computer.

Images and idea from this thread on the Laser Pointer Forums