Axes have an Axis Properties panel. Use this panel to determine whether an axis is numbered using decimal numbers or using fractions and multiples of π.
To open this panel, select the axis and choose Edit | Properties | Axis, or choose Properties from the Context menu.
You can choose Graph | Grid Form | Trigonometric Axis to change this setting for the horizontal axis of the marked coordinate system.
To change this setting for a vertical axis or in a sketch with multiple coordinate systems, you must select the axis and choose Edit | Properties | Axis.