titleElement
A document title.
This should be used to display the main title of the whole document and should occur only once per document. In contrast, level 1 headings are intended to be used for the top-level sections of the document.
Note that additional frontmatter (like an author list) that should appear together with the title does not belong in its body.
In HTML export, this shows as a h1 element while level 1 headings show as h2 elements.
Example
#set document( title: [Interstellar Mail Delivery] ) #title() = Introduction In recent years, ... 
Parameters
body
The content of the title.
When omitted (or auto), this will default to document.title. In this case, a document title must have been previously set with set document(title: [..]).
View example
#set document(title: "Course ABC, Homework 1") #title[Homework 1] ... 
Default: auto