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2 changes: 1 addition & 1 deletion brightnessctl.1
Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ Set minimum brightness when using delta values. VALUE is set to 1 when not provi
.RS 4
Changes percentage scaling curve to exponential (linear by default). Default exponent is 4.

Percentage equation: % = \fI[VALUE]\fR^\fI[K]\fR * \fI[MAX]\fR * 100^-\fI[K]\fR.
Percentage equation: % = (\fI[VALUE]\fR/\fI[MAX]\fR)^(1/\fI[K]\fR)*100.

The exponential curve may make the adjustments perceptually equal.
.RE
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