The Data menu contains commands for setting the size of your design.

A variety of metric and imperial units may be used in Prefit. This command gives you a dialog box where you may choose your preferred units.

Irrespective of the default units specified the Markers window will accept dimensional data in any units. For Example, if the default units were metres, all of the following input would be accepted and converted accordingly -

3 (interprets as 3.00 metres)

This menu function allows you to precisely specify positions for all Waterlines, Buttocks, and Diagonals. Stations are disabled since they are specified by the positions of the defined markers.