refentry.title.properties attribute set
refentry.title.properties Title properties for a refentry title
18pt bold 1em false always 0.8em 1.0em 1.2em 0.5em 0.4em 0.6em

## Description

Formatting properties applied to the title generated for the refnamediv part of output for refentry when the value of the refentry.generate.title parameter is non-zero. The font size is supplied by the appropriate section.levelX.title.properties attribute-set, computed from the location of the refentry in the section hierarchy.

This parameter has no effect on the the title generated for the refnamediv part of output for refentry when the value of the refentry.generate.name parameter is non-zero. By default, that title is formatted with the same properties as the titles for all other first-level children of refentry.