This setting is a boolean expression. It shows or hides a parameter, a user function, or a heading according to certain conditions. For example, you may want to temporarily hide a parameter when it has no effect because of how another parameter is set.
The expression is re-evaluated when a parameter changes. It must be a constant expression, but it can use the values of other parameters and most predefined symbols.
For plug-in parameters, the visible setting affects all sub-parameters of the selected class as well. You can therefore use it to hide all the parameters for a class. If you only want to hide the class name and its Browse button, use the selectable setting instead.
default: int param Choice enum = "One" "Two" default = 0 endparam heading caption = "Options for Two" visible = @Choice == "Two" endheading float param OptionForChoiceTwo default = 4 visible = @Choice == "Two" hint = "Only relevant when Choice is set to Two." endparam