You may have observed an omnipresent company logo on many slides in a presentation — and that raises a question: do you really need to have a company logo on all your slides? First, it takes a fair amount of space. Secondly, the audience knows which company the speaker belongs to since that information is almost always placed on the first slide. Also speakers do introduce themselves and their companies — so, why do all slides need that extra branding? All these questions are fair, and there are equally honest answers for them. You should certainly add a company logo to your first slide, and then place a more subtle or watermarked logo on the rest of the slides — or even no logo at all.
Learn how to add a logo or another graphic to the Slide Master in PowerPoint 2011 for Mac.

