The Zoom tool allows you to zoom in and out.
To use the Zoom tool, first select the Zoom tool from the Tools panel
Click to zoom in. Hold down the Shift key on Windows, or Option key on Mac to zoom out.
You can click and drag to create an area to zoom in to.
You can click the buttons in the Zoom panel to Zoom In, Zoom Out, Zoom to Selection, or Zoom to fit the page.