The Edit Expression command allows you to specify the expressions using the independent and dependent variable that are part of the constraint definition.
These are the variables that are returned to either the constrained entity or the parent constraint definition.
This is a collection of expressions that, when completed, returns the dependent variables for consumption by the either the constrained entity or the parent constraint definition.
The ADD button will allow you to enter a new expression. The expression entry is a string value.
The Remove button removes the selected entry from the collection.
The Change button allows you to modify the selected entry.
The Sort button will sort the strings alphabetically.
The Move Up arrow moves the selected expression higher in the collection.
The Move Down arrow moves the selected expression lower in the collection.