The function 'Show/hide slope arrows…' toggle on and of the slope arrows.
MOUS_ICO Menu: Landscape > Elevation tools - drawing> Show/hide slope arrows…MOUS_ICO Toolbar: Landscape II: Show/hide slope arrows…
When starting the function all slope arrows will be hidden. It is the specific slope objects that will be affected, not its layer.
When in “hidden”-mode, it is still possible to add one or more slope arrows by using Add slope arrow from category Elevation tools. The new slope will not be hidden. Start the function Show/hide slope arrows… to show slope arrows again. If we then toggle back and hide slope arrows again - everyone will be hidden.