Pointer (noun)

1. A device used to indicate the position of a point on a scale.
2. Something that is used to indicate direction, position, or location.
3. Something that is used to direct attention to a particular object, place, or detail.
4. An indicator or guide that shows the way, or helps to find or identify something.
5. Something, such as an arrow or finger, that is used to direct attention to a particular object, place, or detail.

Origin:

Late 16th century: from french pointeur, from pointer "to point", based on latin punctus "point".

Examples:

1. The pointer on the compass was pointing directly north.
2. She used a laser pointer to highlight key points in her presentation.
3. The pointer on the scale showed that he had gained weight.
4. The tour guide used a pointer to indicate important landmarks on the map.
5. She held a pointer in her hand, pointing to the relevant passage in the book.