Magnifying a section of a PDF document

You can live-magnify a section of the PDF file, for example to better view small text.

To magnify a section:

Choose Tools > Magnify Tool.
Click the left mouse button to show or hide the magnifier.

To modify the magnification:

Double-click or triple-click to magnify a larger area.
Hold the Option key for extra magnification.
Hold the Control key for less magnification.
Hold the Shift key to zoom out (invert the magnification).