Set your author name and color in Keynote for iCloud
You can choose the color used for your comments and for the cursor that’s shown when you’re editing a shared presentation.
You can also change the name shown in comments.
Set your color
With a presentation open, click the Tools button
in the toolbar, then choose Preferences.In the Author Settings section, click a color.
The color you choose is used for your comment bubbles, and for the editing cursor and dot beside your initials in the participant list in shared presentations.
Colors used in any presentations that are currently closed are not affected by the new color choice.
Click Done.
Set your author name
With a presentation open, click the Tools button
in the toolbar, then choose Preferences.In the Author Settings section, type a name in the name field.
The name doesn’t apply to presentations that are shared with others. For shared presentations, the name that appears in comments and in the participant list is the name you use with your Apple ID. To change the name (without changing your Apple ID), visit the Apple ID account page. After you sign in, click Edit to the right of your account information, make your changes, then click Done.
If you stop sharing the presentation, the author name reverts to the name shown in Keynote for iCloud preferences.
In shared presentations where you’re not the owner, you can set the name in the participant list only if the presentation’s access is set to “Anyone with the link” and you’re not signed in with your Apple ID; in this case, the name you enter when you join the presentation appears in the list.
Important: If you change the name used with your Apple ID, the name appears in all apps and other locations that use your Apple ID.
Click Done.
New and existing comments are updated to reflect the new name.