README, add full range of gamma note.

EsotericSoftware · Jul 3, 2024 · c72e5e1 · c72e5e1
1 parent 5def0d8
commit c72e5e1
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diff --git a/README.md b/README.md
@@ -131,6 +131,11 @@ The r, g, and b values are percentages where 0 means none of that color and 1 me
 5:30am to 6:00am: transition from 1, 1, 0.7, 0.6 to 1, 1, 1, 1
 ```
 
+For Windows to allow setting the full range of gamma, this registry value needs to be set to 256 (0x100, DWORD).
+```
+HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ICM\GdiIcmGammaRange
+```
+
 ### Colors
 
 Colors can be described as RGB values, as shown above, or as a color temperature: