The is the top triangle on the horizontal ruler?

Answer 1

Use for 'First Line Indent Marker' - click on triangle +hold +drag - move triangle to where you want indent of a paragraph or sentence to begin.

Answer 2

The bottom triangle on the ruler in Microsoft Word is for specifying the hanging indent, and shows where it is currently set to.

Answer 3

First Line Indent Marker

Answer 4

first line indent marker

Answer 5

Indent of first line of paragraph.