Postfix request modifier string. None or more Image Serving commands separated by ‘&’ characters.
Commands in this field always override commands in the HTTP request and in
catalog::PostModifier is useful if certain images require special settings which are normally controlled from the URL, such as
catalog::Modifier should be used for setting most IS commands in the image catalog.
Macros are permitted in
catalog::PostModifier, as long as they are defined in the same catalog or in the default catalog. Custom variables may be used as well.
If a request involves multiple layers, only the contents of
catalog::PostModifier of layer 0 is applied.
catalog::PostModifier of all other layers is ignored.
Text string. Optional.