Sections in PowerPoint not only help you easily manage your presentation slides, but there’s so much more you can achieve using them. You can add and name Sections, move slides from one Section to another etc. And, at any point of time after creating a Section, you can also remove it — or also remove a Section along with its content slides. You can also remove Sections altogether in a presentation.
Learn how to remove Sections in PowerPoint 2010 for Windows.

