Strut (typesetting)
In typesetting, a strut is an invisible character or element, used to ensure that a text has a minimum height and depth, even if no other elements are included.
For example, LaTeX and plain TeX provide the command
\strut
to insert a font size-specific strut. In LaTeX it has a height of 70% of the baseline skip and a depth of 30% of the baseline skip. It ensures that two vertical stacked boxes which include such a strut have the same distance as two normal consecutive lines. LaTeX also supports the creation of general struts using the command:
\rule
where
\strut is equivalent in size to