The maximum number of lines on your viewgraph or slide should be around 8-10 lines of type which is preferably 24pt size or larger for most text and never smaller than 18pt for any text. Also, keep in mind that the best colors for visibility are yellow text on royal blue, white text on royal blue, and black text on white. If it is convenient, attendees will appreciate your effort to bring copies with you to your presentation. If you are not a practiced public speaker, you may want a few tips. You have to be really enthusiastic for your presentation to hold an audience's attention for that 30-minute time period.
Presentations can benefit from the beginning with a formal agenda listing the points to be covered.
Then, maybe you can save the second-most important thing for your big finish. Watch for non-verbal clues to read the audience's reaction. It's a good sign when they are smiling and nodding appropriately at your good points. However, if they start looking around the room or at their watches, pull them back into the talk by asking if they understand what you are saying and what they think of your points so far. Ask the Session Chair to ensure that your position will not obscure the screen so that the audience can see the visuals you will be using.