voxelcore/doc/en/text-styles.md

Text styles

A proprietary Markdown dialect is used to mark up text styles. Formatting works on UI elements: label and textbox, if markup="md" is explicitly specified.

Styles

Style	Example	Output
Bold	**Bold font**	Bold font
Italic	*Text in italics*	Text in italics
Underline	__Underlined text__	Underlined text
Strikethrough	~~Strikethrough text~~	Strikethrough text

Styles can be combined. Example:

***__Message__*** using *~~combed~~ combined* styles__~~.~~__

Output:

Message using combed combined styles.