I am creating a menu list and would like an arrow to appear next to each menu item when i mouse over each item.

To do this i thought i could go to Action Settings and tell it to show or bring the arrow to the front when i mouse over a particular menu list. However the object Actions section in Action settings s greyed out and i can't acces it.

Could you tell me how i access this section. And could you also tell me if this is the right way of going about it.

Basically when i open the main page with the menu list, i want all the arrows to be there on the slide next to each menu item, but i want them to initally be hidden. The when i mouse over a menu item, i want the corresponding arrow to appear.
HOW DO I DO THIS?
Please help.
Thanks.
Olivia Brown