If you aren't inclined to be seen by other users, you have the power to
become invisible to them through the use of items which make you
invisibility by wearing them.  You may also casting or use potions with the
Invisibility spell.

   Others can see you by wearing an item with Detect Invisibility or casting
or using a potion with the Detect Invisibility spell.

See Also: Spell Invisibility, Spell Detect Invisibility