Just click the area you want to select and drag your cursor. Instant Alpha: For some image types you can use this tool to automatically select the background or other objects within an image.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.