1 files changed, 35 insertions, 1 deletions
diff --git a/redshift.1 b/redshift.1
index 1a6f5cd..16b6f4c 100644
--- a/redshift.1
+++ b/redshift.1
@@ -8,7 +8,8 @@ redshift \- Automatically adjust display colour temperature according the Sun
 .IR brightness ]
 [-c
 .IR config-file ]
-[-D | +D]
+[-D | +D] [-E | +E | -e
+.IR elevations ]
 [-g
 .IR gamma ]
 [-l
@@ -89,6 +90,39 @@ Start in disabled state.
 
 Ignored in one-shot mode.
 .TP
+.B -E
+Use wall-clock based schedule.
+.TP
+.B +E
+Use solar elevation based schedule.
+.TP
+.BI -e\fR\  elevations
+Synonym for
+.B -e
+.IB elevations : elevations\fR.
+.TP
+.BI -e\fR\  elevation-high : elevation-low
+Sets the lowest solar elevation during daytime to
+.I elevation-high
+and the higest solar elevation during nighttime to
+.IR elevation-low .
+
+The value should be formatted as real, decimal
+values measured in degrees. Each value shall be
+formatted as one complete value, without unit
+suffix, and not split into degrees, minutes, and
+seconds. Positive values are above the horizon
+and negative values are below the horizon.
+
+.I elevation-high
+or
+.I elevation-low
+may be omitted, to keep unmodified, however at least
+one must be specified.
+
+Implies
+.BR +E .
+.TP
 .B -d
 Keep the process alive and remove the colour effects
 when killed.