You can more easily view detailed or large PDFs using specialized zoom tools.
Choose Tools > Select & Zoom, and do any
of the following:Choose Marquee Zoom, and drag to enlarge an area.
Choose Dynamic Zoom, and drag up to increase or down to decrease magnification.
Choose Pan & Zoom Window. Drag the handles of the box to zoom. Drag the center of the box to pan.
Choose Loupe, and click the desired area.