Microtek i800 User Guide

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Settings window
This lets you lock in the values specified for the width and height of the 
image when it is output. For example, if you know the exact output size for 
your image, enter the output width and height values first, then click the 
Output lock. The image will then be scanned and output at the values you 
specify.
Important: If any of the input values are changed after the lock is on, the 
scaling will be adjusted automatically to preserve the output dimensions 
correctly.
Keep Proportion lock
This lets you keep the proportion of the image width and height despite 
changes made to either setting, and thus preserves the aspect ratio of the 
image correctly. The Keep Proportion lock is automatically turned on when 
you enter values in either the Scan Frame settings or the Output settings.
Additional Notes
     
When none of the Scan Frame options (locks) are locked, all five edit 
boxes are enabled, allowing you to edit or enter values into any of 
the boxes.
     
The scan frame and output size locking options are exclusive each 
other. This means that only one of the locks can be locked at a 
time; locking one of the options will automatically unlock the 
other.
Transform
The Transform command allows you to rotate and / or flip the image in 
increments of 90 degrees.
The effects of the Transform command will be seen in the Prescan image 
or are after you click the Scan To button and scan the image in; the 
Transform effect is not shown in the Overview viewing mode.
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