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Specifies the text orientation for tick-mark labels.
public enum TickLabelOrientation
OrientationAutomatic = 4
Specifies that the text orientation is set by Excel.
OrientationDownward = 1
Specifies that the text is oriented down.
OrientationHorizontal = 3
Specifies that the characters are horizontal.
OrientationUpward = 0
Specifies that the text is oriented upward.
OrientationVertical = 2
Specifies that the characters are vertical.