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-rw-r--r--doc/man/crystfel.72
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/man/crystfel.7 b/doc/man/crystfel.7
index b2876b59..14cdf1f0 100644
--- a/doc/man/crystfel.7
+++ b/doc/man/crystfel.7
@@ -83,6 +83,8 @@ Without only a very few exceptions, CrystFEL is not interested in space groups.
You can append \fB_ua\fR\fIX\fR to any of the point group symbols listed below, where \fIX\fR is \fBa\fR, \fBb\fR or \fBc\fR. This will specify the 'unique' axis for lattices which have one.
+\fBThe default unique axis, where this makes sense, is c\fR.
+
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