Grouping itself comes from `level` in [xl_col_spec()] / [xl_row_spec()]. `xl_outline()` only changes how the controls are *displayed*, which is rarely needed — the defaults match Excel's own.
Arguments
- visible
Show the outline symbols at all. `FALSE` keeps the grouping (and so the collapsing) but hides the +/- controls.
- symbols_below
Put the summary row *below* the detail rows, which is Excel's default. `FALSE` puts it above.
- symbols_right
Put the summary column to the *right* of the detail columns, Excel's default. `FALSE` puts it to the left.
- auto_style
Apply Excel's automatic outline styling to the grouped rows and columns.
See also
[xl_sheet], [xl_colrow_spec]
Other worksheet layout:
xl_colrow_spec,
xl_page_setup(),
xl_sheet(),
xl_sheet_view()
