table_slice <-
displayed: boolDetermines whether the row/column is actually displayed in the table.
The default is @on.
The cells of a not-displayed row are considered to determine the
column-widths, but the row is not displayed. Same holds for
not-displayed columns.
This feature is suitable for quickly inserting and deleting
rows/columns, for example to realise scrolling of not-to-big tables
while maintaining title rows, collapsing/expanding groups of
rows/columns, etc.
BUGS: Hiding rows/columns holding spanned cells may yield unexpected
results.
