progeCAD Professional manual The low-cost alternative to AutoCAD


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Customizing progeCAD - Using a digitizer tablet

Calibrating the tablet

You must specify at least two points for tablet calibration. However, the more points you specify, the more accurate the transformation between the tablet and the screen points. Specifying additional points is particularly useful if you plan to trace a paper drawing that is not orthogonal, such as an aerial photograph.