Represents the "Font" entry of the resource dictionary object.

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

It contains an Element.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 33, page 83.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 34, page 112.

The Font entry maps resource names to font dictionaries. A content stream selects a named font using the Tf operator, which also sets the current font size. Every text-painting operation requires a current font set through this mechanism.