How to add pre-made shapes
To add a new shape, click the Insert button in the toolbar or the Insert menu item in the menu bar, select Shape option and then choose the type of shape you want to add.
You can also use the following keyboard shortcuts to add some pre-made shapes:
Click and drag anywhere within your Canvas or Artboard to add your shape. You’ll see the shape’s dimensions next to your cursor as you drag.
Hold ⇧ as you click and drag to make your shape’s height and width equal.
Hold ⌥ as you click and drag to draw your shape from its center (instead of the top-left).
Hold the Space bar as you click and drag to change your shape’s origin as opposed to its size (handy if you started in the wrong place).
How to add shapes with the Pencil tool
Press P or choose to Pencil from the Insert menu to enable the Pencil tool. From there you can draw any shape you like. When you’ve finished drawing, the Mac app will smooth curves and simplify the path you’ve created.
How to add shapes from SVG Code
You can create new shape layers by copying and pasting SVG code anywhere on your Canvas.