From Slides homepage: Click Create new presentation
From Google Drive: Click New > Google Slides > Blank presentation or From a template.
If you have existing presentations that you created in another program, you can import and convert them to Slides to collaborate with your team.
When you first create a presentation, you can choose a theme to give all your slides the same background and text styles for a consistent look and feel.
For theme suggestions, click Explore assistant and click a layout.
To change the size of your slides, click File > Page setup.
Use the toolbar to customize your presentation even more. Here are the highlights:
When you’re ready to preview or present your slides, click Present at the top of the page. Click the Down arrow to see more options.
To download your presentation so it can be opened by other programs, click File > Download as and choose one of the following formats: