The number of decimal places displayed for each measurement in each set of units can be configured using the Precision panel on the Preferences dialog. From zero to six decimal places may be selected for each measurement type. To change a precision, first select the set of units, then specify the number of decimal places to display for each type of measurement. For example, selecting "in" units and entering three in both the W and H text fields specifies that width and height measurements in inch units should be displayed using three decimal places (e.g. 0.125).

Two types of units can be selected: linear and angular. All positions, lengths and resolutions are specified using linear units (e.g. inches, points). All angles are specified using angular units (e.g. degrees). Selecting a linear set of units, enables the text fields that correspond to linear measurements. Similarly, selecting an angular set of units, enables only those text fields that correspond to angular measurements. Note that custom units are only available for linear measurements. The measurement type text fields are:

• X, Y - Precisions for position measurements (e.g. X1, Y1)
• W, H, D - Precisions for length measurements
• Rx, Ry - Precisions for resolution measurements
• Ar - Precision for area measurements
• A - Precision for angle measurements

To restore all precisions for a given set of units back to their original settings, press the Default button.

To access the precision preferences panel select the Preferences item on the Edit menu then select the Precision tab on the Preferences dialog. The precision panel can also be accessed from the Custom Units preferences panel using the Set Display Precision button.