Keynote
Add shapes and lines in Keynote for iCloud
You can add many types of shapes to your presentation—including lines, circles, quote bubbles, animals, symbols, and more—from the shapes library.
Click the Shape button
in the toolbar.
Choose a category on the left, then click a shape to add it to your slide.
To search for a shape, type its name in the search field at the top of the shapes library.
Drag the shape to reposition it on the slide.
To change the way the shape looks, select it, then use the controls in the Style pane of the Format sidebar on the right.
For example, you can add an arrow on the end of a line, or fill a shape with a different color or an image.