Tips you can use!
Take a quick look at your slides
See if you understand them at first glance. If you don't, edit them so that words and graphics clearly convey what you want to share. Cluttered slides, those that are too busy and/or complicated, result in failure to deliver a coherent message.
If you can't be loud be bold
Every time you speak, you need to be heard. But if you're a naturally shy person, you may connect advice to "be louder" with rude and rowdy behavior. So think of it as projecting a bolder physical presence, and your vocal strength will follow.
Less is always more
When you are putting together your presentation, aim to fill 80% of the allotted time. Trim the boring bits and allow plenty of time for follow-up Q & A—which usually gets shortened, much to the dismay of the audience. No one is ever criticized for running short, especially when summer fun beckons!