You can edit font, size, and color using the Text Style tool to the right of this tier of the toolbar. Text: Tap this box to enter text, then drag the text to where you want it to be.This is force sensitive and lets you draw thicker shapes in reaction to the pressure of your touch. On Macs with a Force Touch touchpad, a second Draw tool appears.
If Preview recognizes a shape you draw it will choose that instead. There is also a Loupe tool which you can use to magnify an area of your image, just drag the green handle to decrease or the blue handle to increase magnification.
When working with a PDF this becomes a rectangular selection tool. It also provides Lasso and Smart Lasso selection tools, on which more below. The Selection Tool: This lets you choose to select an item using a Rectangular or an Elliptical tool.This tool is not available here when working with images. Text Selection: When working with a PDF a text selection tool sits at the far left.