6. Now the image view fills all the workarea, however we can't see the entire image, because it is too large. Another way to navigate large or magnified images is the Hand Tool. Activate it by clicking the button on the Toolbox and drag the image to bring the hidden areas into the view.
Note that you move the view only and not the image itself.

7. Click the Fit On Screen button* on the Options bar. The image is resized to best fit your workarea. Click the Actual Pixels button* on the Options bar to view image as it actually is with 100% zoom.

*These buttons are available only while Hand or Zoom tool being selected. At any other time you can access Fit On Screen command using [Ctrl+0] (Zero) keyboard shortcut; to choose Actual Pixels view, press [Ctrl+Alt+0]

NB Always estimate the sharpness of an image at 100% zoom.