When GiD is installed, the file units.gid is copied within the GiD directory. In this file a table of magnitudes is defined. For each magnitude there is a set of units and a conversion factor between the unit and the reference unit. The units systems are also defined. A unit system is a set of mangnitudes magnitudes and the corresponding unit.
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(or ENABLED)
With the command HIDDEN: 'magnitude', 'magnitude' certain magnitudes will not be displyed displayed in the Problem units window.
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Unit system: It is possible to define more than one 'unit sytemsystem'. When the user select a unit sytem system it mean than when writting writing to the calculation file the fields with units (material properties, conditions, general data, model length) they will be written converted to the reference unit of this magnitude for the selected unit system.
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