Gamma Panel

The Gamma Panel (for Windows) lets you adjust your screen in real-time. You can change more than just the brightness of your display screen. It can adjust the gamma and contrast along with the ability to allow each channel of color including red, green and blue to be modified together or individually. Another valuable feature of Gamma Panel is that you can create a profile that is activated with a pre-defined hotkey. The author tested it on Windows 98SE and XP, and because it uses only standard Win32 API calls it also runs on later versions such as Windows 10. That means you can set up a key combination that switches to your "night" profile instantly.

The program is very simple. It sits in the taskbar notification area and it is there when you need it. You can choose different profile settings in two different ways. First is by pressing the hot-key combination that you assigned to the profile or you can select the entry from the popup menu. The profile you selected last is applied automatically the next time the program starts. It is a quick way to dim your LCD monitor for reading or browsing at night without opening the display settings. A small LUT graph in the main window shows the current correction curve, and pressing Esc resets all controls to their default position.

Gamma Panel is very helpful when you want to change the properties of your screen while a program is running in full screen and you don't want to interrupt the game. It is also small and needs no installation: you unzip it and run gapa.exe.

You can switch screen color profiles with a hotkey even while a full-screen game or another app is running.

All settings and profiles are stored in a gapa.ini file, so the program does not write to the registry and does not need administrator rights. Overall, the Gamma Panel (for Windows) is very functional and easy to use.

Gamma Panel is freeware by Tomasz Porosinski; version 1.0.0.20 from 2002 is the last release and the program is no longer developed.