PowerPoint slides now, you may think I'm reflexively anti PowerPoint, I'm not. But when you are speaking in front of a really large audience, you have to you absolutely have to follow some very specific rules when it comes to PowerPoint. For starters, text, bullet points complete waste of time, you're in a room with hundreds, even thousands 10,000 people watching you. They do not want to have to stare 500 feet away to read text that is simply not how human beings like to read. chances are slim that it's really going to be that visible and easy for people to read. So my recommendation is if you're going to use PowerPoint, and it's fine to do so, use exclusively images, pictures to dramatize your key point.
If you've got a whole lot of text data points complicated Financial charts, email it to people in advance, give them the website at the end where they can download a PDF or a white page. Do not when you're in front of a large crowd, put up complex graphs that have, you know, eight, nine different colors of color coded charts of lines. People can't differentiate that from a distance, so don't even try and people certainly don't want to read a bunch of bullet points from 100 200 300 feet away. Use images in your PowerPoint slides that you project. You want to give people the traditional PowerPoint as an email. a handout later fine Be my guest but don't project it.
It's only going to make you look weak and ineffective.