In the Command Modifier Opus Manual section, I feel it would be helpful to include additional explanations and examples that show how to use a global variable or perform evaluator code with modifiers like @enableif.
More importantly, explain the significance of the equal sign immediately following modifier(s).
For example:
// Valid Syntax: If the result is true, enable button.
@enableIf:=($glob:intTestVar > 3)
// Improper Syntax: This evaluates to false, regardless of intTestVar's value.
// This is because there is a space before the equal sign.
@enableIf: =($glob:intTestVal > 3)
Additional Info:
Command Modifier Reference