Rows from lines
Some tables use graphic lines to indicate rows and columns separators.
PDF2XL OCR will automatically try to use graphic lines to incdicate row breaks, and if it finds such lines, it will set the table be use 'Rows from lines', as can be seen in this example:

You can also force PDF2XL OCR to create rows whenever an horizontal graphic line is found using the Rows from lines command from the Table Layout options.
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