Taking Screenshots problem

I just heard from someone on this forum the cool effect when you press
command, option, ctrl + 8 together. You get the exposure effect on the whole screen.

Anyone know how to capture these screens? I tried capture screen and when i turn the color bak, the screenshot's picture changes bak too.

Thanks lots

Well that's because your colour is not really inverted. It's just outputted that way. An easy way to do that is to open the screenshot in Photoshop and Press Command+I to invert the image.