In comparison to the Automatic PDF to Excel conversion option, the Custom Excel conversion option should be used when the formatting and final appearance of your converted Excel document is more important than the speed at which it is converted. This option allows the end user to designate the column structure of a table, which can be an ideal solution for uniquely formatted tables. In addition, the Custom Excel option allows the user to eliminate headers and footers for tables that span multiple pages, such as database generated reports. Users also have the ability to customize the row structure, and even to preview the Excel spreadsheet before the actual conversion. This will enable users to further prepare their PDF documents for even more precise results in Excel.
In short, Custom Excel option allows you to design the structure of the table according to your needs, i.e. to adjust automatically generated table in a way that will produce the best conversion result.
This article refers to Able2Extract and Able2Extract Professional.