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-rw-r--r--doc/photo.n11
1 files changed, 8 insertions, 3 deletions
diff --git a/doc/photo.n b/doc/photo.n
index 12f0372..f54dc2e 100644
--- a/doc/photo.n
+++ b/doc/photo.n
@@ -248,9 +248,14 @@ the specified color.
Specifies the name of the image file format handler to be used.
Specifically, this subcommand searches
for the first handler whose name matches an initial substring of
-\fIformat-name\fR and which has the capability to read this image data.
-If this option is not given, this subcommand uses the first
-handler that has the capability to read the image data.
+\fIformat-name\fR and which has the capability to write a string
+containing this image data.
+If this option is not given, this subcommand uses a format that
+consists of a list (one element per row) of lists (one element per
+pixel/column) of colors in
+.QW \fB#\fIrrggbb\fR
+format (where \fIrr\fR is a pair of hexadecimal digits for the red
+channel, \fIgg\fR for green, and \fIbb\fR for blue).
.TP
\fB\-from \fIx1 y1 x2 y2\fR
.