An expression can modify a single attribute or it can be used globally to affect attribute values belonging to any Description in the current Collection. For example, you can use the output of a global expression as a constant value for attribute-based expressions and to set any attribute values across multiple operators.
Create global expressions in the
Expression tab of the XGen Editor. Create expressions for attributes and modifiers by clicking this icon
to right of its slider control.
If you are new to using expressions, see XGen expression basics.
For information about creating global expressions, see Create XGen global expressions.
See also XGen Expression Editor.