Define the length and angle units and the tolerance defaults for the active model using the Units and Tolerances dialog.
Standard – This drop-down-list shows the standard used for the active model. You can change it by clicking the arrowhead and selecting one of the following standards:
All models contain standard information. The System Administrator sets up the default for a particular installation. This controls the standard used by all new models.
To change the drawing standards for all models, see Changing the drawing standard
Length – Select the length units for the active model. The options are:
thousandths (0.001 inches).
Angle – Select the angle units for the active model. The options are:
Volume – Select the volume units for the active model. The options are:
gallons (US, liquid)
gallons (US, dry)
ounces (UK, liquid)
ounces (US, liquid)
General tolerance – Select the default tolerance that affects all constructions which do not have a specific tolerance.
Drawing tolerance – This allows you to change the tolerance used for drawing objects. When you draw an object, this tolerance allows you to change how smoothly it is drawn.
Trim Region Editing Tolerances
Angular tolerance – This tolerance is used when surfaces are trimmed.
Surface Discontinuity Tolerances
Angular tolerance – This tolerance is used to decide if a surface contains any discontinuities in the normal direction. This tolerance is compared with the angle between two normals at a point on a surface .
If the angle is greater than the angular tolerance, then the surface is discontinuous at that point.
Show difference between user and model options – If selected:
Options that apply to all models are shown in italics.
Options that apply to the current model only are shown in the standard font.
If deselected, all options are displayed in the standard font to make them easier to read.