Represents the "C" entry of the media play parameters mh/be dictionary object.

It is an optional entry defined as part of the PDF 1.0 specification.

It contains a bool representing a PDF boolean object.

The PDF specification states that this item assumes a value of false if no value has been provided.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 280, page 496.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 291, page 622.

The C entry, when true, causes the media player to display its user interface controls such as play, pause, stop, and seek. When false, the player runs without visible controls.