The Angle property allows you to change the slant angle of the serial label. By default, this property is set to 0 (serial labels are not skewed). Below is what it looks like when the Angle property is set to 0.

Property values can be negative or positive. If the value of the property is negative, the series labels will be slanted counterclockwise. If the value of the property is positive, label with a clockwise slant. The following image shows a chart sample where the series label Angle property is set to 45.