Create and manage Keynote themes on Mac
If you create a presentation that you want to use again as a model for other presentations, you can save it as a theme. Creating your own theme can be as simple as adding your company logo to an existing theme, or you can design a completely new theme.
You can add your custom themes to the theme chooser, save them as a file to share with others, and use them in Keynote on your Mac, iPhone, or iPad. Custom themes that you create on your Mac are grouped in the My Themes category of the theme chooser and are shared across all your devices.
Save a presentation as a theme
If you’re signed in with the same Apple ID on all your devices and have iCloud Drive turned on when you save a custom theme, it’s available on all your devices (but not in Keynote for iCloud).
With the presentation open, choose File > Save Theme (from the File menu at the top of your screen).
Click an option:
Add to Theme Chooser: Type a name for the theme, then click Choose.
Save: Type a name for the theme, then choose where you want to save it.
If you want to email the theme to others, save it to your computer. You can attach the theme file to an email message.
Install a theme from another source on your Mac
You can install a custom theme that you received as an attachment by adding it to the theme chooser in Keynote.
Double-click the theme file (it has the filename extension .kth), then click Add to Theme Chooser.
Note: The theme is already installed on all your devices and available in the My Themes category of the theme chooser if you chose Add to Theme Chooser when you created the theme (and were using iCloud Drive with the same Apple ID).
You can set Keynote to always open a new presentation from the same theme instead of from the theme chooser. Choose Keynote > Preferences (from the Keynote menu at the top of your screen). In the General pane, select “Use theme,” then click Change Theme to select a theme.
Rename or delete a custom theme
If you’re signed in with the same Apple ID on all your devices and have iCloud Drive turned on, deleting a custom theme deletes it from all your devices.
In the theme chooser, Control-click the theme name, then choose Rename or Delete.
If you’re renaming, type a new name, then press Return.
Custom themes always appear in the My Themes category in the theme chooser, in the order in which they were added. You can’t rearrange them.
Edit a custom theme
After you save a custom theme you created, you can’t edit it. However, you can use it as the basis for a new theme.
Choose File > New, then double-click the theme you want to use as the basis for a new theme.
Custom themes appear in the My Themes category in the theme chooser. If you want to use a custom theme that doesn’t appear there, you must first install the custom theme (see the instructions above).
Make your changes, choose File > Save Theme, then choose an option to save the presentation as a new theme.
You can delete the old theme after you create the new one.