plot_tag(theme_element)Plot tag
Parameters
theme_element : element_text
Notes
The ha & va of element_text have no effect in some cases. e.g. if plot_tag_position is “margin” and the tag is at the top it cannot be vertically aligned.
Also ha & va can be floats if it makes sense to justify the tag over a span. e.g. along the panel or plot, or when aligning with other tags in a composition.