How do you create a powerpoint on Libreoffice ?
Start by tagging your question pertaining to “Impress” instead of “Writer” might help a lot. That will give the folks who scan the questions here a better idea what you need help with. I don’t use Impress enough to be familiar with it. But, I believe it is the presentation making part of LibreOffice. Maybe start Impress with the LibreOffice launcher and see what examples are there.