return minimum estimated widths and heights for each table columns and rows in inches.
dim_pretty(x, part = "all", unit = "in")
partname of the table (one of 'all', 'body', 'header' or 'footer')
unit for returned values, one of "in", "cm", "mm".
Soft returns (a line break in a paragraph) are not supported. Function
dim_pretty will return wrong results if
\n are used (they will be
considered as "").