User guide

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Measure
l Calibration options: Tick the checkbox to disable the message that it shown before the calibration
process
l Snapping: Define the points and paths to which the mouse pointer will snap
Notifications
l Show extended tooltips: Shows detailed information about a tool when you hover over its button
l Show explanatory text at the top of dialogs: Shows or hides the summary information which
describes the function of a dialog
l Show WebDav related information bar messages: Shows a message in the info-bar if network
issues affect the opening and processing of the PDF file
l Show information bar if document contains form fields: Shows a message in the info-bar when
you open a PDF document with interactive form fields
l Show information bar when JavaScript is detected, but is disabled in Preferences: Shows a
message in the info-bar reminding you to enable JavaScript to access the scripted features of a PDF
file
l Show information bar if document is certified: Shows a message in the info-bar when you open
a certified PDF document
l Show information bar if document is secured: Shows a message in the info-bar when you open a
PDF document which contains security restrictions
l Show font embedding related information bar messages: Displays information related to font
embedding and usage when editing text
l Show information bar if document is image-based or scanned: Shows a message if the loaded
PDF file is a scanned document or contains text based on images
l Show information bar if document is image-based or scanned: Shows a message when you
open a PDF file that consists of images taken from a document scan or snapshot
l Show explanatory text... Show the text descriptions that appear in the header of various dialogs
l
OCR
l Correct image skew: Straighten any text that is skewed on the document (usually due to a mis-
aligned document during scanning)
l Use fixed threshold: Thresholding is the process of analyzing the histogram of an image to dis-
tinguish the text from the background. A fixed threshold applies the same cut-off point to the
entire image, as opposed to finding the text dynamically. The percentage values indicate the point
at which the contrast between blacks and whites is ideal to recognize text, with 0% being com-
pletely dark and 100% being completely white. This setting is recommended if an image contains
different background colors, or a background which varies in shading or gradient. For more com-
mon OCR operations, it is recommended to disable the fixed threshold setting
l Detect text orientation: Correct pages automatically if rotated at 90, 180, or 270 degree angles
l Smooth color image: Flatten out the colors of the image to remove the JPEG compression artifacts
and help recognition
l Language: Select the language used for text detection
Nitro Pro 9 - User Guide