If I see the message "Please specify at least 6 correspondences for further processing", can I specify more than 6 pairs of correspondences or I can only specify six?
If you see the warning message, you will need to specify at least 6 pairs of correspondences in order to get measurement results back. You can certainly specify more. In fact, the more correspondence pairs you specify, the more accurate the metrology results can get (assuming that the matches are correct and the locations are accurate). There is no such restriction if you do not see the warning message.
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