All linear units except pixels require Meazure to convert from pixels to
the desired units using the screen resolution (dots per inch). For the conversion
to be correct, the screen resolution values must be correct. By default, Meazure
uses the screen resolution values reported by the Windows operating system. These
values are not accurate. You should determine the true screen resolution using the
Resolution Calibration dialog. When you first select
units that requires the use of the screen resolution, a dialog will be displayed
urging you to calibrate Meazure.
To learn more about the screen resolution see the
Resolution Calibration online help.
A custom set of linear measurement units can be defined using the
Custom Units preferences. Once a set of custom units
has been defined, it is displayed on and can be selected using the
menu.