The third option in the powerpoint dialog box is creating a Blank presentation.
To create a blank presentation , preform the following steps:
step-1 start powerpoint . The powerpoint dialog box appears.
step-2 choose Blaank presentation and click the Ok button . The New slide dialog box appears.
step-3 choose the Auto Layout option for the type of slide you want to create and click the Ok button . A blank slide appears.