In FineReader Engine 12 Release 4 Update 1 we introduced a new document analysis mode that provides more exact detection and analysis of tables and charts and significantly improves the detection and recreation of the document layout. 

The single-column analysis is performed on the analysis step and it is enabled by default. Currently there are no specific methods that will allow the end user to turn it off\on again, but if you change any parameters in the PageAnalysisParams Object, this improvement will be turned off.