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--- tog/tog.1
+++ tog/tog.1
and
.Dq myers .
If unset, the Myers diff algorithm will be used by default.
+.It Ev TOG_VIEW_SPLIT_MODE
+Determines whether
+.Nm
+will use vertical or horizontal split for split-screen views.
+If set to
+.Dq h
+then split-screen views will be split horizontally.
+Otherwise, split-screen views will be split vertically.
.It Ev TOG_COLORS
.Nm
shows colorized output if this variable is set to a non-empty value.