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36 Chapter 3
the left panel to become the new starting image for further
enhancement.
The following tools are accessible on the toolbar:
Pointer (F5) - the Pointer is a neutral tool carrying out
different operations under different circumstances (for
example, to pick a color for the Fill operation, or to catch the
deskew line.)
Zoom (F6) - click the tool then use the left mouse button to
zoom in on your image or the right mouse button to zoom out.
You can also use the mouse wheel for zooming in and out -
even in the inactive view. In the active view the "+" and "-"
buttons serve the same purpose.
Select Area (F7) - click and draw your selection on the image
to use a tool only on the selected area. (Image Enhancement
Tools, by default, work on the whole page.) Selection has
three modes (in the View menu): Normal, Additive, and
Subtractive.
Primary/OCR Image - click this tool to switch between the
primary and the OCR image in the active view. Primary
images can be of any image mode, while an OCR image is its
black-and-white version, generated purely for OCR purposes.
Synchronize Views - click this tool to zoom and scroll the
inactive view to the same zoom value and scroll position as
the active view. To make the inactive view dynamically follow
the focus of the active one, click View then choose the Keep
Synchronized command.
Brightness and Contrast - click this tool to adjust the
brightness and contrast of your primary image or a selected
part of it. Use the sliders in the tool area to achieve the desired
effect.