Add a bulleted or numbered list in Keynote for iCloud

You can create lists formatted with bullets, numbers, or letters.

Type one or more items in your list, separating each item with a paragraph break (by pressing Return on a Mac or Enter on a Windows computer).
Select the text you want to include in the list.
In the Format sidebar on the right, click the Style button near the top.
Click the Bullets & Lists pop-up menu near the bottom of the sidebar, then choose an option.
Continue typing your list, separating each item with a paragraph break.
Each new line is preceded by a bullet or number in the format you selected.
To end the list, choose None from the Bullets & Lists pop-up menu, then continue typing text without a list format applied.

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Keynote User Guide for iCloud