You can use pen and highlighter tools to emphasize information on a slide during a PowerPoint presentation. These tools are available from the

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ASet Up group on the SLIDE SHOW tab.
BANIMATIONS tab.
CSlide Show toolbar.
DStatus bar.

Verified Answer :

All these tools are available from the C. Slideshow toolbar. In standard PowerPoint the path to find highlighters looks like this: Click on the Annotate Slides (this button looks like pen on the toolbar) => choose the pen type or highlighter you want. Mouse cursor should change to a dot which you can color however you want by choosing Ink Color option. Finally it's ready for work.