If the text contains more than one level of bulleted or numbered items, the ruler displays indent markers for each level.
First-line
indent, showing the indent position of the bullet or number.
Left indent
marker, showing the indent position of text in the list.
Note To change these settings for all the slides in a presentation, make the changes to the slide master. To display the slide master, on the View menu, point to Master, and then click Slide Master.