2013

It is often advisable to specify a fix constraint at an important geometric
feature. This locks the location of that point or object, and prevents geometry
from relocating when you make changes to the design.
When you fix an object, the angle of a line, or the center of an arc or circle is
also fixed.
Apply Multiple Geometric Constraints
You can apply multiple geometric constraints to objects either manually or
automatically.
When you want to apply all essential geometric constraints to a design
automatically, you can use AUTOCONSTRAIN with the objects that you select
in your drawing. This helps constrain the geometric shape of the
design—depending on your design, there might be cases where you need to
apply additional geometric constraints.
AUTOCONSTRAIN also provides settings in which you can specify the
following options:
 What geometric constraints to apply
 What order to apply geometric constraints
 What tolerances are used to determine whether objects are horizontal,
vertical, or touching
NOTE Fix constraint is not applied with AUTOCONSTRAIN. You must apply the
constraint individually. Equal constraint applied with AUTOCONSTRAIN resizes
the selected arcs to the same radius only. It is not applied to the arc length.
To fully constrain the size and proportions of a design, you will later need to
apply dimensional constraints.
Remove Geometric Constraints
A geometric constraint cannot be modified, but you can delete it and apply
a different one. Several constraint options, including Delete, are available from
the shortcut menu that is displayed when you right-click a constraint icon in
the drawing.
You can delete all constraints from a selection set in a single operation with
DELCONSTRAINT.
Add Constraints to Geometry | 255