Height of the graph. By default this is auto and adjustes to the space that is left after adjusting for x-axis size and legend. Sometimes it might be desireable to set the line height to a certain height, for instance if you have several forestplots you may want to standardize their line height, then you set this variable to a certain height, note this should be provided as a unit object. A good option is to set the line height to unit(2, "cm"). A third option is to set line height to "lines" and then you get 50 % more than what the text height is as your line height

The labels

Number of rows

A legend layout object if applicable