theme chooser
The theme chooser shows thumbnails of the themes you can use to create a new presentation. To open the theme chooser, choose File > New (from the File menu at the top of your screen).To see more themes, move the pointer over a row, then click the left or right arrow (with a trackpad, you can also swipe across the row with two fingers). Double-click a theme to open it.
![The theme chooser. A sidebar on the left lists theme categories you can click to filter options. On the right are thumbnails of pre-designed themes arranged in rows by category. The theme size button is in the top-right corner, where you can set Standard or Wide format. The Cancel and Create buttons are in the bottom-right corner.](https://help.apple.com/assets/647E6ADA8D65E421426CD41B/647E6AE08D65E421426CD439/en_GB/728a60ffe4e297d45c546e663e98a680.png)