There a few threads about this with more detail but as a quick first step try going to Options > PDF Import and experimenting with the scaling, the PDF import engine, and the freeform/monospaced flags. Once you have a reasonably consistent space between the columns, then you can start work in the Report window.
When you define your templates, select the Floating Trap checkbox. For help with this, try the weblog.prn / weblog.xmod files in the tutorial models that are installed with Monarch.
Hope this helps,
It seem that the scaling not work properly. Even if I put it at the maximum my colum stay not aligned. In fact I need to find a way to catch all the information in the line but when the information is not aligned. Also sometime the information for a field is not provided in the report.
Ref Nbr Company ID Invoice Number Doc Date Invoice Date DocType Master Doctype/Refnbr Entered Posted Closed Doc Amount Doc Balance
031053 03 1/25/2011 CK 01-11 01-11 01-11 -60.71
050569 03 10036-SUNSHADES4/6/2011 4/1/2011 VO 04-11 04-11 05-11 10,600.00