Yes. If you have existing Microsoft® PowerPoint® documents, you can edit them directly from Slides without converting them.
If you’d like to use Slides collaboration features, such as simultaneous editing with your team, or targeted feedback comments, you can import PowerPoint files and convert them to Slides. For more information, see Get started with Slides.
The following file types can be converted to Slides:
For more information on importing and converting files to Slides, see Get started with Slides.
Yes, you can download Slides as other file formats such as Microsoft® PowerPoint® and Adobe® PDF documents. For a list of supported formats, see Get started with Slides.
By default, Slides you create are private to you. However, if you create new Slides in a shared folder, they’ll have the same sharing permissions as the folder does—anyone who can view that folder’s contents can also view your new document.
Slides keeps all your drafts in one file, along with a record of who made which changes, so there’s no need to keep multiple copies of a file. See Switch to an earlier version of your file.