Use the following expression syntax components to compose the expression that describes under which condition(s) a ProcessMaker Screen control displays.
If an expression in a control evaluates as True, then that control displays during a Request. If an expression in a control does not evaluate as True, then that control does not display during a Request.
Combine expressions using logical operators. Example:
(not approved) or (cost > 500).
not equal to
less than or equal to
greater than or equal to
does not contain