You can quickly access this dialog box by clicking on the appropriate section status bar.
Units - Select from Millimetres, Centimetres, Metres, Decimal Inches, Fractional Inches, Decimal Feet / Inches, Fractional Feet / Inches. The units chosen are used for all linear input and dimension display.
Display Precision - This rounds X and Y of the cursor position to the nearest increment.
Cursor Increment This controls the precision of the values displayed in the X & Y input fields and on dynamic linear dimensions as the cursor is moved. It is also the default precision for linear dimensions. This precision maybe overridden on Individual dimensions by switching the dimension rounding on.
Display Precision - This rounds the angle value of the cursor position to the nearest increment.
Cursor Increment - This controls the rounding of the values displayed in the Angle & Length input fields, on dynamic angular dimensions as the cursor is moved.