Adding & changing Arrow sizes of Staircase-Revit

The arrow sizes are listed under additional settings in the manage tab.

Make a type by duplicating a relevant family, assign the arrow type, width angle, tick size & fill tick option.

Now to add the directional arrows in staircase go to staircase path in the annotate tab and add the arrow to staircase now you can select the arrow and change it to the one you created.