Step Two preparing Your Content often the content of a presentation is based on a project or research, and one of the most difficult stages of developing a presentation is cutting down your work to fit a 15 to 20 minutes slot. Step Three visual AIDS the use of PowerPoint is an effective visual aid to assist in delivering your presentation. But remember, it is an aid and not the totality of your presentation. The purpose of each slide is to offer a visual outline of what you're presenting