In order to do so following steps need to be performed:

a) Select the slide where you want to begin your first section.

b) From the Home tab, click the Section command.

c) Choose Add Section from the drop-down menu. An UNTITLED Section appears in the left pane.

d) To rename the section while it is still selected, click the Section command, and choose Rename Section from the drop-down menu.

e) ENTER your NEW section name in the dialog box. Then click Rename.

f) In the left pane, click the arrow NEXT to a section name to COLLAPSE or expand it.

In order to do so following steps need to be performed:

a) Select the slide where you want to begin your first section.

b) From the Home tab, click the Section command.

c) Choose Add Section from the drop-down menu. An Untitled Section appears in the left pane.

d) To rename the section while it is still selected, click the Section command, and choose Rename Section from the drop-down menu.

e) Enter your new section name in the dialog box. Then click Rename.

f) In the left pane, click the arrow next to a section name to collapse or expand it.